can you solve (b) and (c)

A mixture of pulverized fuel ash and Portland cement to be used for grouting should have a compressive strength of more than 1,300KN/m2. The mixture will not be used unless experimental evidence indicates concluslvefy that the strength specification has been met. Suppose compressive strength for specimens of this mixture is normally distributed with =63. Let denote the true average compressive strength. (a) What are the appropriate null and alternative hypotheses? H0:=1,300Ha:=1,300H0:=1,300Ha:1,300Ha:=1,300H0:=1,300Ha:>1,300H0: