help Problem $11-22($Static$)$

The forecast for each week of a four$-$week schedule is $50$ units. The MPS rule is to schedule production if the projected on$-$hand inventory would be negative without it$.$ Customer orders $($committed$)$ are follows:

Use a production lot size of $75$ units and no beginning inventory. Determine the available$-$to$-$promise $($ATP$)$ quantities for each period.

Note: Leave no cells blank $-$ be certain to enter $"0"$ wherever required.