Can someone help me plzz its an Algebra 1 question.​

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 value of x in the this question ?

Simplify (1/2)4th power a. (1/16) b.(1/8) c.(1/4)