please help me to solve this out, i badly need help. also please make the solution simple for me to slove this out, thank you so much!

QUARTILES FOR GROUPED DATA C. The table below shows the scores of Grade 10 students in the summative test. Complete the table, and then answer the questions that follow. Lower class boundary Class Interval Frequency Cumulative Frequency (LB) (f) (cf 20 - 24 4 15 - 19 2 10 - 14 3 5 - 9 1 N = _ 1. Solving for Q1 a. Find = b. Find cfb = c. Find LB = d. Find fQ1 = e. Find i = f. Find Q1: (PLEASE SHOW YOUR SOLUTION BELOW) KN - Cfb Q1 = LB + 4 fQ1 2. Solving for Q2 a. Find N= b. Find cfb = 7 L c. Find LB = d. Find fQ2 = e. Find i = f. Find Q2: (PLEASE SHOW YOUR SOLUTION BELOW) KN - Cfb Q2 = LB + 4 fQ2 3. Solving for Q3 3N a. Find 4 b. Find cfb = c. Find LB = d. Find fQ1 = e. Find i = f. Find Q3: (PLEASE SHOW YOUR SOLUTION BELOW) KN - Cfb Q3 = LB + 4 fQ3