A horizontal bar is attached to a wall. When a force of $1$ kN is applied at point A A horizontal bar is attached to a fixed wall on the left and a force of $1$ kilonewton is applied to the right at the free end., the deflection at point A is AA $=0\mathrm{.}5$ mm $.$ When a $1$ kN force is applied at point B A horizontal bar is attached to a fixed wall on the left and a force of $1$ kilonewton is applied to the right at an interior point., the deflection at point A is AB $=0\mathrm{.}2$ mm $.($A given deformation due to a unit load is known as a flexibility factor.$)$

Please do parts A$-$C$,$ all are part of the same question