[ANSWERED] For the bar shown in Figure P3–61 subjected to the linear varying axial load, determine the…

For the bar shown in Figure P3–61 subjected to the linear
varying axial load, determine the displacements and stresses using (a) one and
then two finite element models and (b) the collocation, subdomain, least
squares, and Galerkin’s methods assuming a cubic polynomial of the form u(x) =
c
1
x + c
2
x
2
+ c
3
x
3
.