I don't know where to even start, please help.

Stochastic linear programming. St. Tatiana Hospital needs to develop weekly schedule for its nurses. Each regular-time nurse works 3 consecutive days, compensated at $300 per day, and then has 4 days off. To satisfy variable demand, the hospital can also employ parttime nurses whenever a need arises, paid $450 per day. The hospital is aiming to design a schedule that minimizes the total expected weekly cost of labor. The minimum number of nurses required each day of a week is uncertain and is given by the following equally likely scenarios: In addition, it is required that at least half of the regular-time nurses have weekends (Saturday and Sunday) off. Model this problem as a stochastic linear program and solve it using AMPL