Problem $3$

Use Figure P$13\mathrm{.}15$ and the following data to answer the questions below.

What is:

$($a$)$ the most probable elevation for each of stations $V,W,x,Y$ and $Z?$

$($b$)$ the estimated error in each elevation?

$($c$)$ the adjusted observations, their residuals, and estimated errors?

$($d$)$ the elevation difference from benchmark $A$ to station $Z$ and its estimated error?