The following graph shows the approximate number (in thousands of people who emigrated from Ireland during the period 2010-2014. (t is time in years since 2010). 89 87 10 100 95 90 85 80 75 70 169 65 60 55 50 0 81 82 1 2 3 (a) During which 2-year interval(s) was the magnitude of the average rate of change of E(t) greatest? (Select all that apply.) 2010-2012 O 2011-2013 O 2012-2014 Interpret your answer by referring to the rate of change. During the 2-year interval(s) with the greatest magnitude, emigration from Ireland was increasing at an average rate of people per year. (b) During which 2-year interval(s) was the magnitude of the average rate of change of E(t) least? (Select all that apply.) O 2010-2012 0 2011-2013 2012-2014 Interpret your answer by referring to the rate of change. During the 2-year interval(s) with the least magnitude, emigration from Ireland was decreasing at an average rate of people per year