I just did for one qn. Just repeat the same tjing for the other 3 qns. Im not sure whether u r supposed to plot all 4 graphs in one paper. N the graph i drew is just a rough estimate as i dont hv graph paper with me. Hope it helps. Just do the table for x n u cn solve y with given equation. Hope it helps!

This is roughly what it should look like. A quick way of finding out the gradient m and y- intersect c where the line cross the y axis (y=mx + c).