A sieve analysis test was conducted on a soil sample collected from the site. The test results are provided below.

a$)$ Plot the grain size distribution curve.

b$)$ Determine $\backslash ($ D$\_\{10\},$ D$\_\{30\}\backslash ),$ and $\backslash ($ D$\_\{60\}\backslash ).$

c$)$ Calculate the uniformity coffiecient, $\backslash ($ C$\_\{$u$\}\backslash ).$

d$)$ Calculate the coefficient of gradation, $\backslash ($ C$\_\{$c$\}\backslash ).$

e$)$ Using the soil gradation curve and the calculations above, determine whether the soil is wellgraded, gap$-$graded, or poorly graded. Provide a detailed explanation to support your conclusion.