The storing data in DB by ajax in ASP.NET MVC don’t be run

public ActionResult InsertData_5()
{
    return View();
}

[HttpPost]
public ActionResult InsertData_5(Personal objdata)
{
    try
    {
        //SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings[connectionString].ToString());
        string constr = "Data Source=192.168.100.1;Initial Catalog=ContosoUniversity1;Persist Security Info=True;User ID=sa;Password=Abhar70";
        SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings[constr].ToString());

        con.Open();
        SqlCommand cmd = new SqlCommand("InsertData_SP", con);
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.Parameters.AddWithValue("@FirstName", objdata.FirstName);
        cmd.Parameters.AddWithValue("@LastName", objdata.LastName);
        cmd.Parameters.AddWithValue("@Phone", objdata.Phone);
        cmd.ExecuteNonQuery();
        con.Close();

    }
    catch (Exception)
    {
        throw;
    }
    
    return View("InsertData_5");
}

USE [ContosoUniversity1]
GO
/****** Object:  StoredProcedure [dbo].[InsertData_SP]    Script Date: 02/18/2020 15:04:34 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- Batch submitted through debugger: SQLQuery1.sql|0|0|C:\Users\Administrator\AppData\Local\Temp\~vsF4A9.sql
ALTER PROCEDURE [dbo].[InsertData_SP]
(
    @FirstName nvarchar(MAX),
    @LastName nvarchar(MAX),
    @Phone nvarchar(MAX)
)
AS
BEGIN
    INSERT INTO Personal_tbl2
    (
        FirstName
        ,LastName
        ,Phone
    )
    Values
    (
        @FirstName
        ,@LastName
        ,@Phone
    )
END

@model ContosoUniversity.Models.Personal

@using System.Web.Optimization;

@{
    ViewBag.Title = "InsertData_5";
}

<h2>Index</h2>

<div id="divEmp">

    @using (Ajax.BeginForm("InsertData_5", "Post", new AjaxOptions { HttpMethod = "POST", UpdateTargetId = "divEmp" }))
    {
        <table>
        <tbody>
            <tr>
                <td>FirstName</td>
                <td>                    
                </td>
            </tr>
            <tr>
                <td>LastName</td>
                <td>                    
                </td>
            </tr>
            <tr>
                <td>Phone</td>
                <td>                    
                </td>
            </tr>
            <tr>
                <td>                    
                </td>
            </tr>
        </tbody>
        </table>
        
        <script>
            $(document).ready(function () {
                $("#btnsubmit").click(function () {
                    $.ajax(
                    {
                        type: "POST",
                        url: "Home/InsertData_5",
                        data: {
                            FirstName: $("#txtFirstName").val(),
                            LastName: $("#txtLastName").val(),
                            Phone: $("#txtPhone").val()
                        }

                    });

                });
            });
        </script>
    }
</div>

@{ ViewBag.Title = "first page";  }
<div class="jumbotron">
    <h1>aa</h1>
</div>

<div class="row">
    <div class="col-md-4">
        <div class="navbar-collapse collapse">
            <ul class="btn btn-default">
                <li>@Html.ActionLink("save by Ajax", "InsertData_5", "Home")</li>            
            </ul>   
        </div>
    </div>
</div>