Need help solving for these multiple failed attempts on excel.

the part-time employees is $7.60 per hour. The total number of full-time and part-time employees needed varies with the time of day as shown. Find the optimal solution. (x1,x2,x3x4x5x6,x7x8)=( (b) What is the total payroll (in $ ) for the part-time employees? $ How many part-time shifts are needed? shifts Use the surplus variables to comment on the desirability of scheduling at least some of the part-time employees for 3 -hour shifts. This answer has not been graded yet. hour i where i=1=11:00 a.m., i=2= Noon, etc). Find the optimal solution. (x1x2x3x4x5x6x7x8y1y2y3y4y5y6y7,y8y9)=() How many part-time shifts are needed, and what is the cost savings (in \$) compared to the previous schedule? part-time shifts needed cost savings