
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 the function $f(x)=(x^{2}-a)e^{1-x}$, where $a\in\mathbb{R}$.  
(Ⅰ) Discuss the monotonicity of the function $f(x)$.  
(Ⅱ) When $f(x)$ has two extreme points $x_{1}$, $x_{2}$ ($x_{1} < x_{2}$), it always holds that $x_{2}f(x_{1})\leqslant \lambda[f′(x_{1})-a(e^{1-x_{1}}+1)]$ where $f′(x)$ is the derivative of $f(x)$, find the value of the real number $\lambda$.

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