An 8 × 24 in. (nominal) concrete masonry beam is reinforced with one No. 5 Grade 60 reinforcing bar positioned at 20 in. from the compression face (Fig. P4.3). Calculate (a) moment of inertia of cracked section (b) cracking moment, (c) fMn of the beam, and (d) check if the beam satisfies the code requirements. Assume f ′ m = 1800 psi.