
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 the sets $A=\{x|(x-a)[x-(a+3)]\leqslant 0\}(a\in R)$, and $B=\{x|x^{2}-4x-5 > 0\}$.

(1) Find the range of values for the real number $a$ if $A\cap B=\varnothing$.

(2) Find the range of values for the real number $a$ if $A\cup B=B$.

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