A 5 m long steel bar with a cross-sectional area of 0.01 m 2 is connected to a spring as shown. The spring has a stiffness of 2108 N/m and is initially undeformed. The bar is fixed at its base. The temperature of the bar is increased by 70C. Steel has a modulus of elasticity of 210 GPa and a coefficient of thermal expansion of 11.710 -6 1/C. What is the resulting force in the spring? Clearly identify if the force is a tensile or a compressive force.