Problem \#9: Let \( f(x, y, z)=x^{z / y} \). Find the value of the following partial derivatives.
(a) \( f_{x}(4,4,4) \)
(b) \( f_{y}(2,2,4) \)
(c) \( f_{z}(4,3,2) \)
Problem \#9(a):
Enter your answer symbolically, as in these examples
Problem \#9(b): Enter your answer symbolically, as in these examples
Problem \( \# 9(c) \) : Enter your answer symbolically, as in these examples
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\begin{tabular}{|c|l|l|l|}
\hline Problem \#9 & Attempt \#1 & Attempt \#2 & Attempt \#3 \\
Your Answer: & \( 9(\mathrm{a}) \) & \( 9(\mathrm{a}) \) & \( 9(\mathrm{a}) \) \\
& \( 9(\mathrm{~b}) \) & \( 9(\mathrm{~b}) \) & \( 9(\mathrm{~b}) \) \\
& \( 9(\mathrm{c}) \) & \( 9(\mathrm{c}) \) & \( 9(\mathrm{c}) \) \\
Your Mark: & \( 9(\mathrm{a}) \) & \( 9(\mathrm{a}) \) & \( 9(\mathrm{a}) \) \\
& \( 9(\mathrm{~b}) \) & \( 9(\mathrm{~b}) \) & \( 9(\mathrm{~b}) \) \\
& \( 9(\mathrm{c}) \) & \( 9(\mathrm{c}) \) & \( 9(\mathrm{c}) \) \\
\hline
\end{tabular}