I need help with these three problems, thank you.

A function is given. g(x) = 9+_ -*; X=1, x = 9 (a) Determine the net change between the given values of the variable. (b) Determine the average rate of change between the given values of the variable.A function is given. g(x) = 4 2 3 x; x= -3, x = 2 (a) Determine the net change between the given values of the variable. (b) Determine the average rate of change between the given values of the variable.A function f is given. f(x) = 7 - 2x, 1