text: SELECT 
  		fed_area,
  		round(avg(gdp_growth)::numeric,2)::text||'%' as avg_growth,
  		sum(population) as sum_population,
  		count(state) as no_of_states,
  		string_agg(state, ',' ORDER BY state) as  state_list
  	FROM us_state
  	GROUP BY fed_area
  	ORDER BY 2 desc
  ;
  