Agas station sells q gallons of gasoline per year, which is delivered n times per year in equal shipments of gallons. the cost of each delivery is d dollars and the yearly storage costs are sqt, where t is the length of time (a fraction of a year) between shipments and s is a constant which value of n minimize the costs? hint: express t in terms of n. (use symbolic notation and fractions where needed.)n = the optimal number of deliveries if q (your answer should be a whole number, so compare costs for the two integer values of n nearest the optimal value.)n =