
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 sets $M = \{x \mid -2 \le x \le 5\}$ and $N = \{x \mid a+1 \le x \le 2a-1\}$,  
(1) If $a$ = $\frac {7}{2}$, find $M \cup N$ and $(\complement_RM) \cap N$;  
(2) If $M \supseteq N$, determine the range of real values for $a$.

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