
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 $f(x)= \begin{cases} a^{x}+b, & x\geqslant 0\\ -x^{2}-1, & x < 0\end{cases}$, where $a > 0$, $a\neq 1$.  
(Ⅰ) If $f(x)$ is a monotonic function on $(-\infty,+\infty)$, find the range of values for the real numbers $a$, $b$;  
(Ⅱ) When $a=2$, the function $f(x)$ has only one zero point on $(-\infty,+\infty)$, find the range of values for the real number $b$.

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