For each of the following scenarios, state whether a Type I, a Type II, or neither error has been made.

a) A test of H0: m = 20 vs. HA: m 7 20 rejects the null hypothesis. Later, it is discovered that m = 19.9.

b) A test of H0: p = 0.7 vs. HA: p 6 0.7 fails to reject the null hypothesis. Later, it is discovered that p = 0.8.

c) A test of H0: p = 0.4 vs. HA: p  0.4 rejects the null hypothesis. Later, it is discovered that p = 0.55.

d) A test of H0: p = 0.6 vs. HA: p 6 0.6 fails to reject the null hypothesis. Later, it is discovered that p = 0.5.