4. In a two – story building, an exterior column is to be
designed for a service dead load of 1000 KN, maximum live load of
1500 KN, dead load moment of 60 KN m, and live load moment of 90 KN
m. If the column dimensions will be restricted to 400 mm x 500 mm,
fc’ = 27.6 MPa, and fy = 414 MPa, calculate the required column
reinforcement