Find the optimal solution using dual simplex algorithm

Question

Maximize $ z=-5x_1+10x_2+8x_3$ subject to constraints

$3x_1+5x_2+2x_3<=60$

$4x_1+4x_2+4x_3>=72$

$x_1<=0$

$x_1,x_2,x_3>=0$

Thanks for help :)