PLEASE HELP! Pick one answer.

Find the gradient of f(x, y,z)equals=left parenthesis x squared plus y squared plus z squared right parenthesis superscript negative 1 divided by 2 baseline plus ln left parenthesis x right parenthesis x2+y2+z2−1/2+ln(xyz) at the point left parenthesis negative 2 comma 1 comma negative 2 right parenthesis(−2,1,−2).

Based on the figures as marked, /\rqs = —

Which value of m will create a system of parallel lines with no solution? y= mx - 6 8x - 4y = 12