The quantity of charge $Q$ in coulombs (C) that has passed through a point in a wire up to time $t$ (measured in seconds) is given by $Q(t)=t^3-2t^2+6t+2+2$.
Find the current when:
(a) $t=.5$ sec
(b) $t=1$ sec

The unit of current is an ampere (1 A = 1 C/s).

(a) A
(b) A