4. Total 10% Marks: A Logistic Company wishes to review its distribution operation and from its time sheet records it found that 144 Vehicles were loaded in a 24 hour period. A frequency distribution table was prepared from the data as follows: Time to Load (in Minutes) Number of Vehicles 4045 4 45-50 13 5055 17 5560 44 60-70 59 70-80 7 From the above data construct: a). Cumulative frequency Curve (Ogive) b). From the Ogive - estimate: (I). Median loading time (II) The number of Vehicies loaded under 52 minutes