Ali wants to attend more group exercise classes at his gym. This week, he plans to attend 1 cardio class and 5 weightlifting classes, which will last a total of 237 minutes. Next week, he hopes to attend 5 cardio classes and 5 weightlifting classes, which will last a total of 465 minutes. a) Write a system of equations that represents the above situation.

b) Use the elimination method to show the length of the cardio class and the length of the weightlifting class.