Read the given extracts and answer the questions that follow:

How I laughed at my mother’s false teeth.
As they foamed in the waters beneath.
But now comes the reckonin’
It’s me they are beckonin’.
Oh, I wish I’d looked after me teeth.

(а) What did the poet make fun of?

(b) What do you mean by ‘they’ in fourth line?

(c) Give the meaning of the word ‘beckonin’.