Company X stocks 3 types of products in its warehouse. Inventory levels over time for these products are shown in the figure. Accordingly, an order is placed when stocks fall to the reorder point. Determine the number of storage places required by the company according to (a) dedicated, (b) random, (c) class-based storage policy (Note: Products are divided into 2 categories. Product 1 is in category 1, products 2 and 3 are in category 2).

I(t)

900

550

200

1

I2(t)

360

210

60

13(t)

2

3

4

5

6

1

2

3

4

5

6

600

350

100

1

2

3

4

5

6

Inventory levels over time for 3 products