Alright, so I basically did it like this:
h = b-a/n, where h is the width of each subinterval and n is the number of subintervals
= 2-(-2)/6
= 2/3
Drew a table of values with the x coordinates -2, -1, 0, 1, 2 and y values e^-4, e^-1, 1, e^-1, e^-4
Then I used the formula A ~ (b-a)/6...