how do I solve this

Two operators handle adjustments for a group of 10 machines. Adjustment time is exponentially distributed and has a mean of 14 minutes per machine. The machines operate for an average of 86 minutes between adjustments. While running, each machine can turn out 50 pieces pel hour. Find: Use Iable 1, Table 2 and Iable 3. 0. The probability that a machine will have to wait for an adjustment. (Round your answer to 3 decimal places.) Probability b. The average numbel of machines walting for adjustment. (Round your answer to 2 decimal ploces.) Average numbel of machines walting machines c. The average number of machines being serviced. (Round your answer to 2 decimol ploces.) Average number of machines machines d. The expected hourly output of each machine, taking adjustments into account. (Round your answer to 2 decimal places.) Expected hourly output pleces e. Machine downtime represents a cost of $70 per hour; operator cost (including salary and fringe benefits) is $15 per hour. What is the optimum number of operators? 1 operator 2 operators 3 onerators Two operators handle adjustments for a group of 10 machines. Adjustment time is exponentially distributed and has a mean of 14 minutes per machine. The machines operate for an average of 86 minutes between adjustments. While running, each machine can turn out 50 pieces pel hour. Find: Use Iable 1, Table 2 and Iable 3. 0. The probability that a machine will have to wait for an adjustment. (Round your answer to 3 decimal places.) Probability b. The average numbel of machines walting for adjustment. (Round your answer to 2 decimal ploces.) Average numbel of machines walting machines c. The average number of machines being serviced. (Round your answer to 2 decimol ploces.) Average number of machines machines d. The expected hourly output of each machine, taking adjustments into account. (Round your answer to 2 decimal places.) Expected hourly output pleces e. Machine downtime represents a cost of $70 per hour; operator cost (including salary and fringe benefits) is $15 per hour. What is the optimum number of operators? 1 operator 2 operators 3 onerators