PLEASE HELP WITH THIS

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).

What is the measure of angle tvu shown in the diagram below

Find the slope of the line that passes through the points (0, 0) and (-2, -3). 2/3 3/2 -3/2