I really need help plsss!!!

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).

You decide instead to take the train there. the train will take 135 minutes. convert this into hours and minutes.

If m 17 27 90 63 ** picture is attached