Problem $2$: A plastic limit test has been performed on a soil. Threads of the soil that broke at a

diameter of $\frac{1}{8}in.$ were collected for a moisture content test, which yield the following

results:

Mass of soil $+$ can before placing in oven $41\mathrm{.}30$ g

Mass of soil $+$ can after removal from oven $37\mathrm{.}40$ g

Mass of can $22\mathrm{.}20$ g

Compute the plastic limit of the soil.