5. (Structural eng.) Three of the most commonly used beams in structural engineering are the I-beam, rectangular beam, and cylindrical beam, shown in Figures 4.6 through 4.8. In deter- mining the stress a given weight places on a symmetrical beam, an important design parameter is the beam's rectangular moment of inertia, I, which is typically given in units of in1. The computation of I depends on the beam's geometry, and for the three beam types shown, the values of I are calculated as follows: For an I-beam: For a rectangular beam:- For a cylindriab eam: -where all measure bh3 12 beaBH3-b3 , where all measurements are in inches 12 Figures 4.6 through 4.8 shows the variables b,h, B, and r. Using this information, design, write, compile, and run a C+program that prompts the user for the type of beam and the necessary data (based on the input), and then computes and displays the beam's rectangular moment of nertia. Chapter 4 229 Chapter Summary H h Figure 4.6 An l-beam Figure 4.7 A rectangular beam Figure 4.8 A cylindrical beam