
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
In the number \(6a78b\), \(a\) denotes the thousands digit and \(b\) denotes the units digit. If \(6a78b\) is divisible by 45, what is the value of \(a+b\)?
(a) 5
(b) 6
(c) 7
(d) 8
(e) 9

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