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50 hours available to work on this project. Hourly wage rates are \$30 for Lisa, \$25 for David, and \$18 for Sarah. and S is the number of hours Sarah is assigned to the project.) Min s.t. Minimum Lisa Minimum Sarah S.15(L+D+S) Maximum Lisa Maximum Sarah Total Time L+D+S=120 L,D,S0 (b) How many hours should be assigned to each graphic designer? Lisa's Hours David's Hours x hours What is the total cost (in dollars)? $ (c) Suppose Lisa could be assigned more than 50 hours. What effect would this have on the optimal solution? Explain. The shadow price for this constraint is , since the constraint is . Therefore, additional hours for Lisa --- Select--- change the solution. (d) If Sarah were not required to work a minimum number of hours on this project, would the optimal solution change? Explain. The shadow price for this constraint is , since the constraint is . Therefore, assigning fewer hours to Sarah change the solution