Use keywords "increase" or "decrease" to fill in blanks for the following statements.

1. The safety inventory savings on aggregation _______________as the correlation coefficients between demands increase.

2. The safety inventory savings on aggregation _______________as the replenishment lead time L increases.

3. The safety inventory savings on aggregation _______________with the desired cycle service level CSL.

4. The safety inventory savings on aggregation _______________with the holding cost H.