Passage \( \quad: \) Let us define here three functions in the domain of \( [-1,1], f(x)=\sin ^{...

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Passage \( \quad: \) Let us define here three functions in the domain of \( [-1,1], f(x)=\sin ^{-1} x, g(x)=\cos ^{-1} x \)
Now another function
\[
\begin{array}{l}
I(x)=\max .\{f(x), g(x)\},-1 \leq x \leq 1 \\
J(x)=\min \{f(x), g(x)\},-1 \leq x \leq 1
\end{array}
\]
On the basis of above passage, answer the following questions :
Find the number of points where \( I(x) \) is not differential -
(a) 1
(b) 2
(c) 0
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