I. The following information regarding the performance of students in a quiz assessmiel the shape of the distribution. II. A frequency distribution of the weights of a sample of 30 horses in kilograms are given below: Class Frequency to 140 0 140 to 145 3 145 to 150 5 150 to 155 155 to 160 2 160 to 165 3 165 to 170 4 170 to 175 16 a. What proportion of horses weighs less than 165kgs? b. What proportion of horses weighs between 150 and 170kgs