(7) (a) Use Fermat’s Little Theorem to find the last digit of 3100.(b) Let a be ant positive integer. Show that a and a5 have th same last digit.(8) (a) Find the remainder when 15! is divided by 17.(b) Find the remainder when 2(26!) is divided by 29. (9) Show that 18! ≡ −1 (mod 437)
