What is the optiaml value for x

Suppose we modify the production model in Section 1.3 to obtain the following mathematical model: Max 10x s.t. ax less than or equal to 40 x= 0 where a is the number of hours of production time required for each unit produced. With a = 5, the optimal solution is x = 8. If we have a stochastic model with a= 3, 4, 5, or 6 as the possible values for the number of hours required per unit, what is the optiaml value for x? What problems does this stochastic model cause? Please show work.