(40 points) Consider two machines A and B. The mean time to process a job on machine A is 100 minutes and the standard deviation is 10 minutes. The time to failure on machine A is exponentially distributed with a mean of 60 hours (i.e., the standard deviation is also 60 hours) and the repair time is also exponentially distributed with a mean of 4 hours (the standard deviation is also 4 hours). The mean time to process a job on machine B is 120 minutes and the standard deviation is 20 minutes. The time to failure on machine B is exponentially distributed with a mean of 80 hours (the standard deviation is also 80 hours) and the repair time is also exponentially distributed with a mean of 2 hours (the standard deviation is also 2 hours). Compute the effective mean processing time te and effective coefficients of variability ce of these two machines