Fill in the blanks:
(i) The product of a rational number and its reciprocal is ........ .
(ii) Zero has ......... reciprocal.
(iii) The numbers ......... and ...... are their own reciprocals.
(iv) Zero is ........... the reciprocal of any number.
(v) The reciprocal of a, where ` a ne 0` , is .......... .
(vi) The reciprocal of `(1)/(a)`, where `a ne 0`, is ........... .
(vii) The reciprocal of a positive rational number is ............ .
(viii) The reciprocal of a negative rational number is ............ .