A two-span one-way slab-beam floor system is to be designed to carry a uniformly distributed live load of 4.0 kPa. In addition to self-weight, the slab must carry a superimposed dead load of 1.5 kPa. Use the simplified coefficients method for moments and shear forces. Take f'c = 40 MPa, Ec = 30000 MPa, fsy = 500 MPa. Slab thickness is 200mm. The clear span Ln=5000. Cover is 20mm. All reinforcement is N12