4. Create an excel spreadsheet that calculates the practical moment capacity of the beam based on the following input parameters: fc,fy, b, h, cover, main bar size, and stirrup bar size. Clearly indicate which parameters are input parameters. All necessary code checks should be also included in the spreadsheet and all relevant ACI code sections should be referenced. Use the spreadsheet to perform design of the beam in Problem 1 using trial-and-error approach. 4. Create an excel spreadsheet that calculates the practical moment capacity of the beam based on the following input parameters: fc,fy, b, h, cover, main bar size, and stirrup bar size. Clearly indicate which parameters are input parameters. All necessary code checks should be also included in the spreadsheet and all relevant ACI code sections should be referenced. Use the spreadsheet to perform design of the beam in Problem 1 using trial-and-error approach