A media agency wishes to hire two employees, Jeremy and William, to prepare advertising campaigns for their clients. Jeremy can prepare 30 campaigns per day and earns $177 per day, while William can prepare 29 campaigns per day and earns $177 per day. William can only be employed for up to 4 days of the week due to a medical condition. Additionally, due to labor union regulations, Jeremy can be hired for no fewer days than William. If the media agency has at least 115 campaigns each week, how many days per week should the office employ each intern to minimize its costs? (a) Identify and clearly define the variables needed to solve the linear programming problem. x = the number