With = 0.5, r = 0.5, and = 5.0. Why is the optimal absorption lower

With α = 0.5, r = 0.5, and γ = 5.0. Why is the optimal absorption lower than in Exercise 1?
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.