LO 3 - Apply techniques to improve efficiency and effectiveness of operation system to support a firm performance (25 points) 1. Quality - 15 points Ten samples of 15 parts each were taken from an ongoing process to establish a p-chart for control. The samples and the number of defectives in each are shown in the Table 1: Sample 1 2 3 4 5 6 7 8 9 10 n 15 15 15 15 15 15 15 15 15 15 Table 1. Number of Defective items in the Sample 3 1 0 0 0 2 0 3 1 0 a. Develop a p-chart for 95 percent confidence (1.96 standard deviation). (10 points) b. Based on the plotted data points, interpret the results. (5 points) 2. Cash-to-Cash Cycle Time Problem - 10 points PT. Mangane Kopi Nusantara (PT. MKN) produces green coffee bean. The company has found it increasingly difficult to keep accurate inventory and cash flows. Data: Sales over last 30 days = $5,560,000,- Accounts receivable at the end of the month = $587,250,- Inventory value at the end of the month = $776,000,- Cost of sales = 60 percent of total sales Accounts payable at the end of the month = $456,000,- Calculate current cash-to-cash cycle for PT. MKN. (10 points)