1 1.4 The minimum gratuity amount is 10% of the Sub-total amount. Determinethe minimum gratuity (tip) the FOUR friends should pay to the waiter. Calculate the total amount of the bill. 1.5 1.6 (2) The FOUR friends decided to divide the total amount of the bill equally amongs themselves. Calculate the amount each person must pay. 6 (2 ​