
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
Modern Internet technology has greatly promoted the development of the express delivery industry. According to a survey, a small "college student entrepreneurship" express delivery company in Changsha completed a total of 100,000 and 121,000 deliveries in March and May this year, respectively. It is assumed that the growth rate of the total number of deliveries per month by the company is the same.

(1) Find the monthly average growth rate of the total number of deliveries by the express delivery company.

(2) If each person can deliver up to 0.6 thousand items per month on average, can the company's current 21 express delivery staff complete the delivery tasks in June this year? If not, how many additional staff members are needed at least?

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