
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 function $f(x)=\ln x-ax+ \frac {1-a}{x}-1(a\in\mathbb{R})$.
- (I) When $a\leqslant \frac {1}{2}$, discuss the monotonicity of $f(x)$;
- (II) Let $g(x)=x^{2}-2bx+4$. When $a= \frac {1}{4}$, if for any $x_{1}\in(0,2)$, there exists $x_{2}\in[1,2]$ such that $f(x_{1})\geqslant g(x_{2})$, find the range of the real number $b$.

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