Please help me with this

The owner of a small deli is trying to decide whether to discontinue selling magazines. He suspects that only 10.8% of his customers buy a magazine and he thinks that he might be able to use the display space to sell something more profitable. Before making a final decision, he decides that for one day he will keep track of the number of customers that buy a magazine. (a) Explain why this is a binomial experiment. (b) Assuming his suspicion that 10.8% of his customers buy a magazine is correct, what is the probability that exactly 4 out of the first 14 customers buy a magazine? Give your answer as a decimal number rounded to two digits. (c) What is the expected number of customers from this sample that will buy a magazine? Use the space below to type your answer AND/OR to upload a picture of your work for all the questions in this problem. To upload a picture of your work, use a cellphone camera or a free scanning app (such as Adobe Scan, Simple Scanner, Tiny Scan, ..), download the picture or document to your own computer via email, and attach your document using the "attach file" sign (paper clip symbol) on the menu bar below. Please do not use "insert/edit image" (picture sign) to upload your file. 20