How to make Column Interaction Diagram using Mathcad

How to make Column Interaction Diagram using Mathcad
0:00 Input material strength, column size and reinforcement
1:25 Calculate Maximum Load Capacity if Column is Concentrically Loaded
2:13 Calculate Maximum Load and Moment Capacity when Column is Eccentrically Loaded
2:13 Calculate Steel areas and effective depth
3:37 Define all formulas in terms of "c"
7:15 CORRECTION: when taking Moment about T, please use Pn(c) * (e(c) + h/2 - d')
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8:22 Specify a series of "c" values and Plot the load(P) and moment(M)
10:07 Extract the load and moment capacity at any given point or condition
11:49 Extract all values of eccentricity, load and moment capacity at the specified c values