how to do this question, I don not know how to do it

The population of a certain country between 1921 and 2008 with projections to 2010 can be modeled as p(t) = 8'039(1.035t) million people where tis number of years since the end of 1900. (a) What was the average population of the country from the beginning of 199:) through the end of 2010? (Round your answer to three decimal places.) I X million people (h) In what year was the population of the country equal to the average found in part (a)? (c) What was the average rate of change of the population of the country from the beginning of 1990 through the end of 2010? [Round your answer to three decimal places.) mil ion people per year (d) Illustrate the answers from pans (a), (b), and (c) on a graph of p. pfi') million ptt} million people aeryear people peryear 350 350 Average value Average rate ofchange 300 300 250 250 : Average rate Average value : of change 200 l 200 E 150 i t years 150 r years __._._._._._._._._._._._._._._._._._._._._._ Q 90 95 100 105 110 since 1900 0 SD 95 100 105 110 since 1900 p (I) million 3:? (r) million people peryear people peryear 350 Average value Average rate ofchange 30E) 250 Average rate Average value of change : r r x r r x r r L x