Managers want to analyze the inventory of customers at HEB grocery store between $5$ PM and $11$ PM$.$ Assume that $40$ customers arrive between $5$ PM and $7$ PM$,100$ customers arrive between $7$ PM and $9$:$30$ PM$,$ and only $30$ customers arrive between $9$:$30$ PM and $11$:$00$ PM$.$ Further, assume that there is only one open server between $5$ PM and $11$ PM and its maximum processing rate is $30$ customers per hour. Fill in the input flow rate, output flow rate, inventory build$-$up rate and the corresponding ending inventory levels in the table below.

$\backslash$table$[[$Time$,5-7pm,7-9$:$30$pm$,9$:$30-11pm$