
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 $A=\{x|x^{2}+3x-4 < 0\}$ and $B=\{x| \frac {x+2}{x-4} < 0\}$.

1. Find the probability of "$x∈A∩B$" for any real number $x$ in the interval $(-4,5)$.
2. Let $(a,b)$ be an ordered pair of real numbers, where $a$ and $b$ are integers taken from sets $A$ and $B$ respectively. Find the probability of "$a-b∈A∪B$".

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