Answer the following questions related to the graph of a linear inequality in two variables:
a. (i) Define the boundary line associated with a linear inequality in two variables.
b. (ii) State the criterion for deciding whether this boundary line should be drawn as a solid line or a dashed line on the Cartesian plane.
c. (iii) For the inequality 3x−4y<12, write its boundary equation and indicate, with reason, whether the boundary must be solid or dashed when you draw the graph.