Hi, can you please explain

Question 1. Auditors sample records at random so that they can check the oompliance of rms with relevant aooountins standards. Subpose the auditors are checking invoioes from sales, some of which have Way terms [payment is expected within 3i] daysl and some of whid'i have an option to return the goods, and reverse the transaction. There is some overlap of these categories, and the population of all the documents is represented in a 1iienn Diagram 0.3 1. if the auditor selects an invoice at random, what is the probability that it doesn't have 30day terms? 2. what event does the probability {$.35 written in the WM diagram oorrespond to? 3. Calculate P(Rev i'i Edd) 4. If one invoice that can be reversed is chosen at random, what is the probability that it has terms of 31!] clays