For each of the cases below determine if the heat engine satisfies the first law (energy equation) and if it violates the second law.
a)Qh = 7kW, Ql = 3 kW = 5kW
b)Qh = 7kW, Ql = 7 kW = 0kW
c)Qh = 7kW, Ql = 4 kW = 3kW
d)Qh = 7kW, Ql = 0 kW = 7kW