How do I read variables from a txt file in Fortran

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Windows

FORTAN

Hello, I have a problem with a code. I would like to read some files and set them to a variable in Fortran programming language. Ihave a file called "number.txt" which has 2 lines and one column. I would like to set the numbers of first line to a variable called x (real number) and the number of second variable to a variable called z (real number too).
after all, I would like to calculate variable y which is calculated from a spesific equation (I set the equation on my code trial).

Could you please help me?

What I have tried:

program test
implicit none

real x,z,y1,y2


open(7,file='numbers.txt',status='old')
open(8,file='results.txt',status='unknown')

y1=10

y2=x**2+z**2

close(1)
end program test