a) what is the class size?
b) which age group has the least number of participants?
c) how many participants have age less than 25 years?
d) what percentage of participants have age more than or equal to 30 but less than 40 years?​

a what is the class sizeb which age group has the least number of participantsc how many participants have age less than 25 yearsd what percentage of participan class=