Make a tally chart using groups 60-69, 70-79, 80-89, 90-99 ...

Here are the weights, in kg, of 20 male students all aged 18
 

61 98 72 84 63 77 77 81 85 72 90 83 76 82 77 81 80 83 75 68
 

a) make a tally chart using groups 60-69, 70-79, 80-89, 90-99
b) make a frequency table.
c) a healthy weight for an 18 year old male is about 70-80kg. comment on the weights of this group of students