Please answer the attachment below

This table shows a barangay's record of registered voters: (15 pts) Age Group Population Percentage Sample (in years) 15-25 350 26-36 365 37-47 240 48-58 205 59 and 140 above Total 1300 100 250 0 The barangay would like to conduct a survey on the voter's perception of the peace and order situation in the barangay during the recent election. a) Complete the table (10 points) b) What sampling techniques/method is used? (2 pts] c) Are all age groups represented in the study? Why or why not? (3 pts.)