HW $1$ Axially Loaded Members

For the problems given below, determine the reaction $A($find reactions at A and $D$ for the last problem, whic is statically indeterminate$)$ and draw the axial force, stress, strain and displacement diagrams. Use the princi of superposition for the last problem to find the reaction at $D$ first, then use statics to determine the reaction

A$.$ Note the different cross$-$sectional areas A and, for the $3$rd problem, in addition to changing areas, various materials as indicated by the

different modulus of elasticity $E$ values.

Please make sure you do all the graphs axial foce diagram, stress, strain and displacement diagram please