Write the equation of motion of the one-story, one-bay frame shown in Figs. P1.15.The flexural rigidity of the beam and columns is as noted. The mass lumped at the beam is m; otherwise, assume the frame to be massless and neglect damping. Check your result from Problem 1.15 against Eq. (1.3.5). Comment on the effect of base fixity by comparing the two equations of motion.