Deep lane storage is used for storing a soft drink product. The dimensions of the unit load are 42  48. The flue clearance is 12, the rack is 6 wide, the clearance between a load and the rack is 4, and the aisle width is 8. Six tiers of storage are used. Three hundred pallet loads of the product are to be stored. Determine the following values:

a. x, using continuous approximation.

b. x, when the quantity of pallet loads to be stored is reduced to 30 and using enumeration.