Q$.)$ The Northside Bank is working to develop an efficient work schedule for full$-$time and part$-$time tellers. The schedule must provide for efficient operation of the bank, including adequate customer service, employee breaks, and so on$.$ On Fridays, the bank is open from $9$:$00$ a$.$m$.$ to $7$:$00$ p$.$m$.$ The number of tellers necessary to provide adequate customer service during each hour of operation is summarized as follows:Each full$-$time employee starts on the hour and works a $4-$hour shift, followed by a $1-$hour break and then a $3-$hour shift. Part$-$time employees work one $4-$hour shift beginning on the hour. Considering salary and fringe benefits, full$-$time employees cost the bank $$15$ per hour $($$$105$ a day$),$ and part$-$time employees cost the bank $$8$ per hour $($$$32$ per day$)$a$.)$ Model and solve the problem as described in the textbook to minimize the total staffing cost. What is the cost of this optimal solution? How many full$-$time employees are required in this solution? How many part$-$time employees are required?