Figure: Circular bar inside a rigid frame

Part A: Given the circular, linearly elastic Bar $AB$ inside a rigid frame that does not change dimensions

$($shown in the figure, above$),$ find the axial normal strain, $,$ in the bar if the temperature of the bar is

increased by $60\mathrm{.}0C$

Part B: Given the circular, linearly elastic Bar AB inside a rigid frame that does not change dimensions

$($shown in the figure, above$).$ Find the axial normal stress, ${}_x,$ in the bar if its temperature is increased by

$60\mathrm{.}0C$

Part C: Given the circular, linearly elastic Bar $AB$ inside a rigid frame that does not change dimensions

$($shown in the figure$),$ find the axial normal stress, ${}_x,$ in the bar if the temperature of the bar is increased

by $80\mathrm{.}0C.$

PLEASE EXPLAIN ALL STEPS AND SHOW ALL UNITS. WILL UPVOTE!