a financial consultant has an average of six customers arrive each day. The consultant's overhead requires that at least five customers arrive in...

a financial consultant has an average of six customers arrive each day. The consultant's overhead requires that at least five customers arrive in order that fees cover expenses. Find the probabilities of 0 through 4 customers arriving in a given day. What is the probability that at least 5 customers arrive? Need this done in excel with formulas and graph.