1.a) The electricity consumed in kwh/unit of 50 household of a certain community were as follows.68, 84, 73, 82, 68, 90, 62, 88, 76, 93, 73, 79, 75, 60, 93, 71, 59, 85, 75, 61, 65, 88, 87, 74, 62, 95, 78, 63, 72, 66, 78, 75, 75, 94, 77, 69, 74, 68, 60, 96, 78, 82, 51, 52, 53, 61, 75, 95, 98 and 60.From the above information i) construct the grouped frequency distribution having suitable class and class interval ii) draw a less than ogive and find the percentage of families who consumed 60 unit or below iii) find third quartile graphically.