$77.$ Answer Increase or Decrease in the following questions: $(6$ Pts$)$a$.$ If a reorder point is increased, what happens to its service level?b$.$ If a reorder point is increased, what happens to its safety stock?c$.$ If a reorder point is decreased, what happens to its stock out risk?d$.$ In a fixed order quantity policy, if the policys order size is decreased, what happens to averageinventory level?e$.$ In a fixed order quantity policy, if the policys order size is decreased, what happens to thefrequency of ordering?f$.$ In a fixed order quantity policy, if the policys order size is increased, what happens to thereorder point