If 772 \(\equiv\) 4 \((mod \ 24)\) and 703 \(\equiv\) 7 \((mod \ 24)\), then find the subtraction and multiplication in modular arithmetic.
1. 69 \(\equiv\) \((mod \ 24)\)
2. \(\equiv\) 28 \((mod \ 24)\)
(Note: Insert a negative sign wherever necessary.)