we need to find the lowest values
the length is (3-0)/3=3/3=1 width
area=length times width, since all are 1, just add the heights
evaluate f(0) and f(1) and f(2) and f(3)
find the one that is the lower one and use that one
f(0)=16
f(1)=15
f(2)=12
f(3)=7
for f(0) and f(1)
f(1) is lower so the height for this one is f(1) or 15 is height
for f(1) and f(2)
f(2) is lower so height is f(2) or 12
for f(2) and f(3)
f(3) is lower so height is f(3) or 7
15+12+7=34
yep you're right
