Let `R` be a relation in N defined by `R={(a , b); a , b in N\ a n d\ a=b^2dot}` Are the following true: `(i)\ (a , a) in R\ AA\ a in N` `(ii)\ (a , b) in R=>(b , a) in R` `(iii)\ (a , b) in R ,(b , c) in R=>(a , c) in R`