If anyone could answer these

Suppose a store sells an average of 80 cases of soda per day. assume that each case contains 24 cans of soda and that the store is open 10 hours per day. find the average number of soda that the store sells per hour.

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)

Which angle is the smallest? also give me an explanation so i can complete it to other questions as well, : )