I need help putting this into algebra formula: 9) Emma left Peter's house and drove toward the ocean. Two hours later, Peter left, driving 18mph faster than Emma in an effort to catch up with her. After three hours, Peter caught up withEmma. What was each person's average rate? Please include the following in your work: a) A statement defining any unknown quantities in the problem in terms of variables. b) An equation involving the variable(s) corresponding to the information given in the problem. c) A complete solution to the equation, showing all work. d) A answer to the question asked,including appropriate units