A vending machine dispenses hot chocolate or coffee, Service duration is 30 seconds per cup and is constant. Customers arrive at a mean rate of 80 per hour (assume Polsson). Also assume that each customer buys only one cup. Determine: a) The average number of customers waiting in line. =80M=30=0.5lowi. L5=1160160=1.0906Lq=45PP=0.580=460 b) The average time customers spend in the system. Ws=2Ls=801.0006=0.0125 c) The average number of customers in the system. Ls=1160160=1,0062 d) the probability that the vending machine is empty