Question 57463
I will show b) for you and you can follow the steps to repeat for a) and c)

when solving for a function f(x) = x^2 - 7x + 10 where f(5) is the question, you substitute 5 in for x

f(g)=5^2-7(5)+10
now you simplify the equation,

25-35+10=f(g)
in this case 0 is f(g)

in all the other case simply substitute in the number for x to solve.

Good luck.