4. (25 points) Product A has two components A1 and A2. Each unit of A needs 2 Al's and 3 A2's. Product B has two components B1 and A2. Each unit of B requires 1 B1 and 2 A2's. Two processors, P1 and P2 are involved in producing the products and the components. Each processor consists of one machine and one operator. The processing times in hours for the products and the components are given below. Components Processor A B Α1 A2 B1 P1 1.2 0.8 P2 1.8 2.0 0.4 0.3 The average number of 8-hour working days per month is 22. In the coming month, 300 units of A and 400 of B are to be produced. Determine the number of processor P1 needed to produce the required units of A and B in the coming month.