
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 that $A(0,2, \frac {19}{8})$, $B(1,-1, \frac {5}{8})$, $C(-2,1, \frac {5}{8})$ are three points on plane $α$, and the normal vector of plane $α$ is $\overrightarrow{a}=(x,y,z)$, find the ratio of $x$ : $y$ : $z$ = $\_\_\_\_\_\_\_\_\_\_.$

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