Question: 5. Use direct proof to prove statements below: a) The sum of an odd and an even integer is odd. b) The sum of two

5. Use direct proof to prove statements below: a) The sum of an odd and an even integer is odd. b) The sum of two odd integers is an even integer. c) The square of an odd integer is an odd integer. d) If x is an even integer and y is an odd integer, then x2 + y2 is odd. I e) The product of two odd integers is an odd integer

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