solve this LPP using the simplex method

Max z = 50x_1+48x_2+90x_3

subject to 2x_1+2x_2+2x_3 <= 16
6x_1+4x_2+9x_3 <= 36
9x_1+3x_2+12x_3 <= 60

where x_1,x_2,x_3 >= 0