3. Two timber section of 5cm x15cm each are connected together to form a T-section of a beam, and find the bending moment from a simply supported beam depicted in Fig. 2. Find the tensile stress at the extreme fibres of the cross section. 15 cm 5 cm 8 kN 12 kN/m 4 kN 6 kN 30 45 15 cm FIm--1.5 m- 2 m 1.5m 5 cm Fig. 2