A timber beam of rectangular cross-section has a span of 4.8m and is simply supported at its ends. It is required to carry a load of 45kN Uniformly distributed load over the entire spain. Find the values of breadth and depth of the beam if the maximum bending stress is not to exceed 7.8 MPa and Maxamum deflection is limited to 9.5mm. Take E = 10.5 GPq.