$2\mathrm{.}1$ Verify if the given coefficient values of elements $C_{1,1}^1,C_{1,2}^1,C_{1,3}^1,$ and $C_{2,1}^1$ are correct.

$2\mathrm{.}2$ Compute the missing values of the global matrix.

$2\mathrm{.}2$ Determine the dependent variable $($M$)$ at global node $6.$ Show all steps of your

calculations.

Note: you may use Excel ${?}^{o+}$ worksheet but you will need to present detailed calculations.