
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
Calculate: $\left(-49\right)\times \frac{4}{7}-\frac{4}{7}\div (-\frac{8}{7})$;  
Solution $1$: Original expression $=\left(-49\right)\times (\frac{4}{7}-\frac{4}{7})\div (-\frac{8}{7})$①;  
$=\left(-49\right)\times 0\div (-\frac{8}{7})$②;  
$=0$③;  
Solution $2$: Original expression $=\left(-49\right)\times \frac{4}{7}-\frac{4}{7}\times (-\frac{7}{8})$①;  
$=-28+\frac{1}{2}$②;  
$=-28\frac{1}{2}$③;  
$(1)$ Solution $1$ has an error starting from step ____; Solution $2$ has an error starting from step ____; (Fill in the step number)  
$(2)$ Please provide the correct solution.

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