A gas is taken through the cyclic process described in the figure. (The x axis is marked in increments of 4 m².) P (kPa) 8 B 6 A 4 А 2 с V (m) (a) Find the net energy transferred to the system by heat during one complete cycle. k] (b) If the cycle is reversed-that is, the process follows the path ACBA-what is the net energy input per cycle by heat? k]