A company has sales offices in four cities. An analysis of the company's accounts receivables reveals the number of overdue invoices by days, as shown to the right. Assume the invoices are stored and managed from a central database. Complete parts a through d below. a. What is the probability that a randomly selected invoice from the database is from the City C office? 0.2749 (Round to four decimal places as needed.) b. What is the probability that a randomly selected invoice from the database is between 30 and 90 days overdue? (Round to four decimal places as needed.) ... Days Overdue City A City B City C 140 124 211 77 40 67 Under 30 days 30-60 days 61-90 days 31 29 61 Over 90 days 19 26 44 City D 297 119 46 62