Let $A=\{2,3,5\}$ and $B=\{x,y\}.$ Let $P1$ be the relation of AxB onto the first coordinat which means $P1((a,b))b.$ For example, for $r=(2,x),P(r)=x.$

Justify your answer for the following:

A$)$ Is the relation mentioned in the question a well$-$defined function?

B$)$ If the relation is a function, is it one$-$to$-$one correspondence?

C$)$ If the relation is a function, find the inverse of the function.

$sinx$

$va+vb=u$

va