Please help me write this code in C programming language and explain what each command means and why we are using it in the code. Thank you!

Declare 2 square matrices (3x3 is suggested size) with elements of type double. Initialize them with values (you do not have to enter them from console; initialization in code will suffice); Given these matrices (A and B), calculate and output: 1) Transposed A 2) Matrix addition A+B 3) Matrix Subtraction A-B 4) Matrix product A*B