Answer the next two questions using the following information:

Consider the weekly data in the following table:

Period

$1$

$2$

$3$

$4$

$5$

Gross requirements

$20$

$40$

We have $40$ units on hand as inventory. Lead time is one week. We are going to use lot$-$for$-$lot ordering strategy to develop an MRP $($i$.$e$.,$ order sizes are equal to net requirements$).$