PLEASE SOLVE 2 and 3 QUESTONS.. PLEASE HELP ME!!

->X=0

->Show three decimal places in calculations.

b 1 1.5 e d t=2 15 2. A production process requires 5 different machines and the current layout with operation times in minutes is given. Shrinkage ratios are 5%, 3%, 6%, 4%, and 1% for machines a, b, c, d, and c, respectively. The output should be (X*10+100) units. Personal allowance is given 4%. Suppose that 2 hours are available for this batch and the process is as efficient as 65% of the time. a. Calculate the required number of machines. b. Calculate each machine's idle time. 3. A manufacturer wants an MTBF of at least 1,000,000 hours. Recent results for (X*10+25) units were 4 failures at 15,000 hours, one failure at 45,000 hours, and another at 85,000 hours. The remaining units were still running at 100,000 hours. a. Determine percent of failures, b. Determine the number of failures per unit hour, c. Determine MTBF at this point in the testing and interpret it