Sketch the graph of \[ y = \frac{4x-1}{x+5}. \] Hence, or otherwise, find the set of values of \(x\) for which \[ -1 < \frac{4x-1}{x+5} < 1. \]

Find the set of values of \(x\) for which \[ 3x^3 + 2x^2 + 6 \ge 19x. \]

Sketch the graph of \[ y = \frac{4x-1}{x+5}. \] Hence, or otherwise, find the set of values of \(x\) for which \[ -1 < \frac{4x-1}{x+5} < 1. \]

Find the set of values of \(x\) for which \[ 3x^3 + 2x^2 + 6 \ge 19x. \]