Use Excel to plot the Pn$-$Mn interaction diagram for a reinforced concrete circular column. Make the diameter of the column, No$.$ of longitudinal bars, size of longitudinal bars, cover thickness, and material properties as inputs and the diagrams as outputs. Compare your diagram with the graph excerpted from the textbook shown as below.

Task I: Use the parameters assigned to you to calculate the Pn$-$Mn using Excel spreadsheets;

Task II: Use at least $11$ points including one on the y axis and one on the x axis to plot the Pn$-$Mn values in Excel.

Task III: Write a report to summarize the procedure used in your spreadsheet and include discussions on discrepancies or similarities of your results with the textbook results.

fc$\text{'}($psi$)=5000$

fy $($psi$)=60000$

Diameter of Column $($in$)=16$

Number of Bars $=8$

Bar Size$=10$

Spiral Size$=4$

Clear cover $($in$)=2$