Please do this question in excel and explain/show the formulas

There are 2 copy machines in the copy room. It takes 2min to copy a document. Suppose 6 documents arrive at time 0,0.5,1,3,3.5, and 3.75min. When a document arrives, it is copied right away if a copy machine is idle; otherwise, it waits on a single waiting line. Simulate this example till all 6 documents are copied. Calculate: (a) the average time in system (b) the average waiting time If there is 1 copy machine in the copy room, and it takes 1min to copy a document. Answer the same questions in the previous example. If the costs of the 2 systems are the same, which system is better? Why