An insurance company researcher conducted a survey on the number of car thefts in a large city for a period of 30 days last summer. The raw data are shown. Construct a frequency distribution table using the classes 50-54, 55-59, 60-64, 65-69, 70-74, and 75-79. Construct an ogive using relative frequency. [Marks 04] 52, 62, 51, 50, 69, 58, 77, 66, 53, 57, 75, 56, 55, 67, 73, 79, 59, 68, 65, 72, 57, 51, 63, 69, 75, 65, 53, 78, 66, 55