$3.$ Going back to our packaging line time study from last week, we see the following standard times for each of the four steps of their process:

a$.$

a$.$ What is the current hourly capacity of this four$-$step packaging process $($# of trays$)?$

b$.$ At the current cookie production process capacity of $320/$hour and a tray that holds $12$ cookies, is the packaging process able to keep up with the cookie production process?

c$.$ How much excess capacity exists in the packaging process?