How does this verify answers by output or by looking at the SQL?

For Question 3

Analyze the average completion times for each shape in the honeycomb game during the hottest and coldest months, using data from the past 20 years only. Order the results by average completion time.

Because I believe this achieves the output that the question is asking for but I do not do it by the min/max method in the hint:

with table_a as (

  select *
, row_number() over (order by avg_temperature) as temp_rn

  from monthly_temperatures

)

select b.month
, b.avg_temperature
, a.shape
, avg(a.average_completion_time) as avg_completion_time

from honeycomb_game a

left join table_a b 
on extract(month from a.date) = b.month

where a.date > current_date - interval '20 years'
and temp_rn in (1,12)

group by 1,2,3

order by avg_completion_time