Answer
a) lower estimate $\approx 21.6$; upper estimate $\approx 11.6$
b) lower estimate $\approx 19$; upper estimate $\approx 14$
Work Step by Step
a)
lower estimate: $\approx2(5)+2(3)+2(1.7)+2(0.8)+2(0.3)=21.6$
upper estimate: $\approx2(3+1.7+0.8+0.3+0)=11.6$
b)
lower estimate: $\approx 1(5+4+3+2.4+1.7+1.2+0.8+0.5+0.3+0.1)=19$
upper estimate: $\approx 1(4+3+2.4+1.7+1.2+0.8+0.5+0.3+0.1+0)=14$
