$3\mathrm{.}6-4$ Element $j$ is a $Q4$ element that is to be attached to structure nodes $19,20,30,$ and $31,$ as shown. Assume that the structure stiffness matrix is to be stored as a futl matrix, without use of a sparse$-$matrix storage format. D$.$of$.$ are $u$ and $v$ at each node. What is the numerical contribution of element $j$ to the single coefficient of $[$K$]$ at the intersection of

$($a$)$ row $48$ and column $397$

$($b$)$ row $37$ and column $377$

$($c$)$ row $59$ and column $61?$