two advertisements are placed on a $50$x$50$ cm and $15$ m high column, $1$ m apart, the one placed on the upper part measures $6$ m wide and $2$ m high, the other measures $2$ m wide and $2$ m high. if the wind speed is $40$ m$/$sec at a temperature of $20\backslash$deg C and v $=0\mathrm{.}0000147$ m$^2/$sec$,$ u$=0\mathrm{.}0000176$ kg$/$m$*$sec$.$calculate A$.-$ total force applied on the whole. B$.-$bending moment to be resisted by the base.