State whether the following statements are ture or false ? Justify your answer. `(i) (sqrt2)/3` is a rational number. (ii) there are infinitely many integers between any two intergers. (iii) Number of rational numbers between 15 and 18 is finite. (iv) there are numbers which cannot be written in the form `p/q q ne 0,` p and q both are intergers. (v) the square of an irrational number is always rational. (vi) `(sqrt12)/sqrt(3)` is not a rational as `sqrt12 and sqrt3` are not integers. (vii) `sqrt (15)/sqrt3` is written in the form `p/q , q ne 0 ` and so it is a rational number.