3. [4 marks] In a recently stocked fish pond, the growth rate of the fish population is given by: P'(t) = 100 - 15et + 13, where t is in years. Evaluate, by hand, P'(t) dt (to the closest integer) and interpret the result, be specific. 1 12 + 87% OOCHOU e SH rch F11 F9 F10 X C F6 F7 F8 F2 F3 F4 F5 S % O @ 5 6