There are four (1)65.5~70.5 75.5~80.5, 10 15.5~80.5, 12 80.5~85.5, eight 85.5~90.5 and six 90.5. 6/45* 100%= 13% The good frequency is 20; 20/45* 100%=44% Excellent frequency is 9; 9/45* 100%=20% and draw a fan chart (3) Just draw a distribution histogram and a line chart directly.