For the fast-food restaurant chain of the previous exercise, assume that customers turn away from the store if all three service stations are busy. Let Y t denote the number of service stations busy...

For the fast-food restaurant chain of the previous exercise, assume that customers turn away from the store if all three service stations are busy. Let Y_t
denote the number of service stations busy at time t. Then, (Y_t)_t≥0
is a continuous-time Markov chain. Exhibit the generator matrix.