12) Compute P55 and P80 for the data given below : 80 3 18 28 42 6 19 29 45 6 20 32 45 20, p = 20, p 29 45, p 8 23 32 45 80 p 80 80 10 23 35 46 45 30 45 29 12 24 36 46 12 25 39 46 15 25 40 47 15 26 41 48 P55 o b) P55 o d)