7. This is a linear programming formulation of a labor planning problem. There are four overlapping shifts, and management must decide how many employees to schedule to start work on each shift. The objective is to minimize the total number of employees required while the constraints stipulate how many employees are required at each time of day. Shift 1: At least 12 employees are required, Shift 2: At least 15 employees are required, Shift 3: At least 16 employees are required, Shift 4: At least 14 employees are required. Clearly write the Decision Variables, Objective Function, and Constraints under separate headings