marks obtained by 12 students in college test (x) and the university test (y) as follows x: 45, 41, 50, 68, 47, 77, 90, 100, 80, 100, 40, 43 y:63, 60, 60, 48, 85, 56, 53, 91, 74, 98, 95, 43. what is your estimate of the marks a student would have got in the university test if he got 60 in the college test but was ill at the time of university test.