Show the complete solutions (Given, Unknown, solutions, and conclusion). 1. In a class of 20 learners, 1/4 have a younger sibling. How many learners in the class have a younger sibling? 2. During a sale, all items are advertised at 10% off the retail price. A coat usually costs Php 600. How much is the discount on this item? If you are to buy the coat, how much will you pay? 3. A piece of ribbon measures 80 cm, a 10% of the ribbon is cut off. What length of ribbon is cut off? Express your answer in hundredths. 4. In a survey, nine out of ten people said that they preferred summer over rainy seasons. Express this in decimals and percents. 5. A bag is advertised as having 20% off the retail price. If the bag usually costs Php 450.00, how much is the discount? How much is the bag