Two repairmen are hired for attending 8 machines in a workshop. Assume that machines break down according to a Poisson distribution with mean 4 per hour and that the repair time is exponentially distributed. Suppose each repairman can repair 6 machines per hour. - (i) Find the probabilit that the two repairmen are idle and the probability that one repairman is idleh (ii) What is the expected number of idle machines not being serviced