A plane truss has joint loads P, 2P, and 3P at joints D, C and B, respectively where load variable P=23kN. All members have two end plates which are pin-connected to gusset plates. Each end plate has thickness T_p=16mm, and all gusset plates have thickness t_g=28mm. If the allowable shear stress in each pin is 83MPa and the allowable bearing stress in each pin is 124MPa, what is the minimim required diameter d_min of the pins used in either end of the member BE?