(a) What is the downward displacement of point C, which is at the midpoint of the beam, when the moment M₀ is applied? Data for the structure L = 1.8 m, are as follows: M₀ = 10.0 kN·m, Θ = 2, E = 216 kN/m², k₁ = 250 kN/m, and k₂ = 160 kN/m.
(b) Repeat part (a), but remove M₀ and apply a 0.