Indicate the impact of the following on the cash and operating cycles, respectively. Use the letter I to indicate an increase, the letter D for a decrease, and the letter $N$ for no change:

a$.$ The terms of cash discounts offered to customers are made less favourable.

b$.$ The cash discounts offered by suppliers are decreased; thus, payments are made earlier.

c$.$ An increased number of customers begin to pay in cash instead of with credit.

d$.$ Fewer raw materials than usual are purchased.

e$.$ A greater percentage of raw material purchases are paid for with credit.

f$.$ More finished goods are produced for inventory instead of for order.

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