Holly owns Holly’s Health Studio a gym that offers many types of fitness classes.   One class that is offered is group weightlifting.   One day the 9am class consists of 20 people and is very crowded. Immediately after the 9am class leaves the 10am class comes in. Between the number of people in the 9am and the fact that it is 102 degrees outside the floor in the studio is full of water puddles of sweat. During the 10am class Billy slips on a puddle of sweat and falls into Susan who is his workout partner for that exercise.   Billy twisted his ankle and Susan broke her arm when she tried to catch herself during the fall. Who can Billy sue and why? Who can Susan sue and why? What defenses exist for anyone you said could be sued?