Determine the inverse of each element of U(15). For the entry a (mod 15) in the table below, if a (mod 15) belongs to U(15) then enter an integer 1 < b < 15 so that b (mod 15) is an inverse of a (mod 15); if a (mod 15) does not belong to U(15) then enter 0. a 1/a (mod 15) 1 2 4 7 8 11 13 14

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