A L=(14+0.1*A)-ft long simply supported timber beam carries a P=(6+0.1*A)-kip concentrated load at midspan, as shown in figure; and the cross-sectional dimensions of the timber are shown, see figure. (a) At section a-a, determine the magnitude of the shear stress in the beam at point H. (b) At section a-a, determine the magnitude of the shear stress in the beam at point K. (c) Determine the maximum horizontal shear stress that occurs in the beam at any location within the span length. (d) Determine the maximum tension bending stress that occurs in the beam at any location within the span length.