Three power plants have the following fuel cost (in $/hour), where the power is in MW: C = 0.15P+32P + 3200 C = 0.25P2 + 20P + 2400 C3= 0.1P3 +35P3 + 1800 If the demand is 150 MW, and ignoring losses and generators limits, answer (1)-(3): 1) The incremental fuel cost of plant 1 when the generated power P, is 76 MW is 2) The incremental fuel cost at which the optimal dispatch is achieved is 3) The amount of power must be generated by plant 2 for optimal dispatch is