
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Given $f(x)=\frac{2}{3}x^{3}-2ax^{2}-3x (a\in R)$.
(I) Find the range of values of the real number $a$ such that $f(x)$ is a decreasing function in the interval $(-1,1)$;
(II) Discuss the number of extreme points of $y=f(x)$ in the interval $(-1,1)$ for different values of the real number $a$.

Present the answer in LaTex format: \boxed{Your answer}
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