It’s easy trust me don’t make it hard on yourself !
First of all simplify the equation:
F(x)= 2/4(x)= 1/2(x)
Second step go ahead and replace x by 5 because it says f(5) in the question:
F(x)=(1/2)(5)= 5/2
Final answer:
F(x)= 5/2
I hope you understand my explanation and wish you all the best and good luck!!