The inequality is -12x + 3y > 9.
PART A:
The sytem has no solution if inequality does not share a common area. The inequality -12x + 3y > 9 consist the region to left of line -12x + 3y = 9. So for no solution the region to left of equation -12x + 3y = 9 is suitable.
Thus inequality for no solution is, -12x + 3y < 9.
PART B:
For infinite solution the region of both inequality must overlap each other, or the inequality is same with some multiplication of divison factor. So inequality for infinite many solutions is,
![\begin{gathered} (-12x+3y>9)*-1 \\ 12x-3y<-9 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/q81d29uvkwkkkq6mx0o27s10gzyszc012q.png)
Thus inequality for infinite many solution is 12x - 3y < -9.