1. Calculate the ultimate strength values, P and Mn for the following column for the following values of the location of Neutral Axis, c from the right side of the column.

Also, for each c, plot the points having coordinates (M₁, P) to create the interaction diagram for this column. Comment on the change in the eccentricity as c increases as well. In your design use concrete with compressive strength of 5,000 psi and 8 #9 Grade 60 steel bars. c=0", 2.5", 5", 7.5", 10", 14",18", 24" 18" 18" 2.0 in. 2.0 in. 2. For the column of Problem 1 estimate the axial force and moment corresponding to the points of i) pure compression, ii) pure tension, iii) balance strain conditions, iv) pure moment, v) a point in tension-controlled side of the interaction diagram, vi) a point in the compression side of the interaction diagram.