Explain (Briefly) What Is Wrong with Each of the Following $\mathrm{H}_{0}:\pi=1.2, \quad \mathrm{H}_{\mathrm{a}}:\pi> 1.2$

Essay

Explain (briefly) what is wrong with each of the following sets of hypotheses:
a. $\mathrm{H}_{0}:\pi=1.2, \quad \mathrm{H}_{\mathrm{a}}:\pi> 1.2$
b. $\mathrm{H}_{0}: \hat{ }p=.5, \quad \mathrm{H}_{\mathrm{a}}:\hat{p}> .5$
c. $\mathrm{H}_{0}:\mu=69, \quad \mathrm{H}_{\mathrm{a}}:\mu\geq 69$
d. $\mathrm{H}_{0}:\pi\neq .5, \quad \mathrm{H}_{\mathrm{a}}:\pi=.5$