This question tests the understanding of roster form representation of sets. As per the textbook, in roster form, all elements are listed separated by commas within braces {}. Key points to remember: (1) Order of elements is immaterial, (2) Elements are not repeated - all elements are distinct. For part (i), integers from -3 to 6 are listed. For part (ii), natural numbers start from 1, so numbers 1-5 are included. For part (iii), all two-digit numbers whose digits sum to 8 are found systematically. For part (iv), prime divisors of 60 are identified by factorizing 60 = 2² × $3 \times 5$. For parts (v) and (vi), letters are listed without repetition as per the note in the textbook.