Income(in thousands):0-8 ; 8-16 ; 16-24 ; 24 ; 32-40 No.of students: 8 ; 35 ; 35 ; 14 ; 8 1.Draw a cumulative frequency curve to estimate the median income. 2. If 15% of the students are given freeships on the basis of their parents income, find the annual income of the parents, below which the freeships will be rewarded. 3.Calculate the arithmetic mean.