Evaluate the line integral

${\displaystyle \underset{C}{\overset{\phantom{}}{}}}$grad$*dr$

for potential function

$(x,y,z)=\frac{1}{2}(x^2+y^2+z^2)$

and curve

$C$:$r(t)=($:$cost,sint,\frac{t}{}$:$)$ for $\frac{5}{6}t\frac{11}{6}$

Hint: You can use The Fundamental Theorem for line integrals

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