A 18in Square column is reinforced with four No.14 bars, one in each corner with cover distances 2in. to the steel center in each direction. Material strengths are fc'= 4000psi and fy =60,000psi. Construct the interaction diagram relating axial strength Pn and flexural strength Mn.Bending will be about an axis parallel to one face. Calculate the coordinates for Po, P b,and at least three other representative points on the curve.