7X and 4x respectively.∴ The DIFFERENCE between the quantity of Wet and Dry waste picked on Monday = 7x - 4x = 3x = 27 kg∴ x = 9 kg∴ Quantity of wet waste picked on Monday = 7x = 7 × 9 = 63 kg.Quantity of dry waste picked on Monday = 4x = 4 × 9 = 36 kg.Let the wet waste and dry waste picked on Friday be 12x and 7x respectively.∴ The difference between the quantity of Wet and Dry waste picked on Friday = 12x - 7x = 5X = 40 kg∴ x = 8 kg∴ Quantity of wet waste picked on Friday = 12x = 12 × 8 = 96 kg.Quantity of dry waste picked on Friday = 7x = 7 × 8 = 56 kg.∴ The average weight of the Wet waste picked by the truck in all the five days = (63 + 110 + 99 + 84 + 96) / 5 = 90.4 kg.