The current in a conductor varies in time as shown in the figure below. Current (A) 300 250 200 150 100 50 Time (s) 2 4 6 8 10 12 (a) How many coulombs of charge pass through a cross section of the conductor in the interval from t = 0 to t = 12.0 s? C (b) What constant current would transport the same total charge during the 12.0-s interval as does the actual current? A