(Please answer questions in order). A grocery store worker has to collect all the shopping carts left out in the parking lot. he collects for carts and measures the length of the four carts he is pushing to be 51 inches. he collects another cart for a total of five carts and measures the length of the five carts to be 57 inches. A) he sees that there are a total of 21 carts in the parking lot. how long will the line of 21 carts be. B) if he is pushing a line of carts that is 117 long, how many carts does he have? C) how long is a single cart