A factory utilizes a closed loop of N=10 Automated Guided Vehicles (AGVs). They occasionally break down and queue for a single repair station. The breakdown rate per AGV is lambda = 1 per day, and the mechanic's repair rate is mu = 4 per day. The probability of having 0 AGVs in the repair system is given as P0 = 0.50. Using the limited customer number model, what is the average number of AGVs currently in the total repair system (waiting + being repaired)?