The following are monthly salaries in a company of 30 employees in Accra: 100 87 65 77 99 116 97 105 95 80 86 106 93 135 95 108 127 86 148 116 76 88 69 112 118 89 During the last festive period, the company gave bonuses of 10, 15, 20, 25, 30, 35, 40, 45 and 50 to her employees in respective salary groups: exceeding 60 but not exceeding 70, exceeding 70 but not exceeding 80, and so on up to exceeding 140 but not exceeding 150 (a) Put the above data into frequency distribution table. (b) Find the mean bonus​