How would I answer the following two questions?

The population of rabbits (in thousands) in a forest at time t months is modeled by the equation R(t) = 50the-t + 8 where t 2 0 When does the largest number of rabbits in the forest occur in the interval 0 s t s 4 Oo 2 3 0 4 y = xe - 2X, 0 s xs In(3) On this interval, the minimum value(s) occur at x = O : two of these are correct O In (3) Oo