Q$7.$ One research studied a storage battery used in the launching mechanism of a shoulder$-$fired ground$-$to$-$air missile. Three material types can be used to make the battery plates. The objective is to design a battery that is relatively unaffected by the ambient temperature. The output response from the battery is effective life in hours. Three temperature levels are selected, and a factorial experiment with four replicates is run. The data are as follows: $($a$)$ State the hypotheses of interest in this experiment. $($b$)$ Finish the following ANOVA table