QUALIFIED

"It doesn't add up" the mathematicians said
They scratched their heads and went to bed
"There are no stars in the sky" the astronomers say 
Maybe because it's daylight and during the day 

"Where are the patients today ?" the doctors said 
Could it be that no more diseases are spread
" I can't see anybody now" the opticians say
Everyone has perfect eyesight for this I pray 

Whatever the trade or whatever the skill 
A qualified person always is there to fit the bill