Melanie has purchased a fitness centre/gym which will be open 24 hours a day, 7 days a week. She only intends to have the gym supervised with staff from 6am - 9pm and after 9pm, customers can enter the gym and use the facilities by swiping their membership cards on the keypad. Melanie is concerned that her customers may injure themselves with the machines or weights when there are no staff supervising. Melanie would like to know if there is/are anything she could include in the contract or on her premises to ensure that she will not be liable for losses in the event a customer carelessly injures themselves. In your own words, advise Melanie