Which of the following relations are functions? Give reasons. If it is a function, determine its domain and range. (i) `{(2," "1)," "(5," "1)," "(8," "1)," "(11 ," "1)," "(14 ," "1)," "(17 ," "1)}` (ii) `{(2," "1)," "(4," "2)," "(6," "3)," "(8," "4),"