Looking Back to your Lesson Os 1200 buc yutonul to fino al From your previous lesson, you have learned to solve routine and non-routine problems using data presented in a single or double-bar graph. TRY THIS Use the data on the graph to solve the problems. Number of Pupils who's Birthdays Fall within the Period Indicated 100 50 0 Number of Students 28 Janua... 36 April... 19 July... 53 Octo... 1. How were pupils many surveyed? 2. How many pupils celebrated their birthday during the second half of the year? 3. How many more pupils celebrated their birthdays from January to March than July to September? 4. Which half of the year does more pupils celebrating their birthdays? January to