#7 "Clockwise" - Irregular X3 Sudoku

Each row, column and irregular region must contain the digits 1 through 8.

All instances of adjacent cells that sum to 3, 6, 9, 12 or 15 has been marked with its respective roman numeral, and ? clues can be any of the five options Solve on F-Puzzles https://f-puzzles.com/?id=y3c9rh4g