**Q8: **

The figure shows the curve with marked points and .

Use the secant between and to get a lower bound on the length of the curve between those points.
Give your answer to 3 decimal places.

Use the three additional points at to get a better approximation of this length to 3 decimal places.

Calculate the length of the curve exactly, giving your answer to 4 decimal places.

**Q10: **

The figure shows a part of the curve ,
with marked points , , , and .

Given that the arc length from to
is given by ,
the first thing we need for an arc length parameterization is the inverse
. Determine so that .

Hence, give the arc length parameterization , of the curve.

The arc length between each of the points , and is one unit. Give the coordinates of to 3 decimal places.