Determine the stiffness matrix K

for the truss. AE

is constant.

Suppose that K$=$AEM$=$AE$$M$1$M$2$M$3$M$4$M$5$M$6$

$,$

where the submatrices M$1$

$,$ M$2$

$,...$ M$6$

are row matrices that are equal to the rows of the matrix M