1. Suppose that coverage criterion C₁ subsumes coverage criterion C_2. Further, suppose that test set T ₁ satisfies C₁ on program P, and test set T₂ satisfies C₂, also on P.

(a) Does T₁ necessarily satisfy C ₂? Explain.

(b) Does T₂ necessarily satisfy C₁ ? Explain.

(c) If P contains a fault, and T₂ reveals the fault, T₁ does not necessarily also reveal the fault. Explain.²

2. How else could we compare test criteria besides subsumption?