
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
Let set $A=\{x|4-x^{2} > 0\}$, $B=\{x|y=\lg (-x^{2}+2x+3)\}$.  
(Ⅰ) Find the intersection of sets $A$ and $B$;  
(Ⅱ) If the solution set of the inequality $2x^{2}+ax+b < 0$ is $B$, find the values of $a$ and $b$.

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