A team of 24 customer service representatives works at a customer service hotline which operates 24 hours a day. There are four shifts. Normal shifts are
from 5 am to 11 am, 11 am to 5 pm and 5 pm to 11 pm. Midnight shift is from
11pm to 5am. On average, 630 calls are received everyday during the 3 normal
shifts and 115 calls are received during the midnight shift.

On average, how many calls are received by each representative during each hour of the normal shift?