need help

Suppose that f(t) = t

Suppose that 2t 3. (a) What is the average rate ot change off(t) over the interval 4 to 5? (b) What is the (instantaneous) rate ot change of f(t) when t= 4? The average rate of change ot t(t) over the interval 4 to 5 is (Simplify your answer.) The (instantaneous) rate ot change ot t(t) when t- 4 is (Simplify your answer.)