With r = 1.0 and = 5.0, but without picking a value for a. How does

With r = 1.0 and γ = 5.0, but without picking a value for a. How does the optimal absorption depend on α?
Show that the rate of absorption is maximized at T = 1 with the absorption function
A(T) = αT
(Equation 3.9.2) for the above values of α, r, and γ.