Direction: Read the following information carefully and answer the questions which follow:

There were paintings exhibition of 8 friends on different days and some paintings were sold by them. They sold paintings on 8 different dates of a month February which are 1^st, 7^th, 9^th, 13^th, 18^th, 20^th, 25^st and 28^th. Number of paintings sold on different days are 7, 9, 14, 12, 15, 16, 19 and 21 not necessarily in the same order.

The artists sold the least and the most number of paintings on the first and the last day respectively. On 7^th the artist sold 3 more painting than the artist who sold on 20^th February. The odd number of paintings were sold on even number of dates. More paintings were sold on 25^th than 9^th February. On 9^th more than 15 paintings were sold.