Adjustable Cells

a$.$ If profit margin for X is increased by $10,$ what would be the change in optimum value? What if it is increased by $15?$

b$.$ If profit margin for Y is decreased to $30,$ what would be the change in optimum value?

c$.$ If $3$ hours of extra labor can be provided for a total cost of $$200,$ should the company do it$?$Why or why not?

d$.$ The machining availability has dropped from $7$ to $6\mathrm{.}5.$ What impact will this have on the optimal solution and the optimal value?

e$.$ The painting availability has dropped from $6$ to $5\mathrm{.}5.$ What impact will this have on the optimal solution and the optimal value?