I need help, can you please answer these for me:

20 1. a) Draw the secant line on the function /(x)=x2 18 shown to represent the average rate of change between the points (0, 0) and (-4, 16). 16 b) Determine the average rate of change between the 14 points (0, 0) and (-4, 16). 12 10 8 6 2 2. Consider the series: -5 -4 -3 -2 4 5 4 4 S, = 4 4 4 4 4 4 3 5 7 9 11 13(-1)-1 2n -1 In this series, as " -> 0 , the sum of the series approaches . (This is incredibly cool by the way!). What does it mean to say the limit of the series approaches " ? 3. Determine the limit of each of the following functions if they exist: a) lim x -16 b) lim x-2 x-4 x-x-12 x-4