Refer to the graph and answer the given questions.
Data related to number of elephants in two Reserves A and B of country X during 6 years
What is the average number of elephants in reserve B during 2001, 2003, 2005 and 2006?
46
56
51
53
49
51
Required average number of elephants in Reverse B
=18+42+64+804=2044=51