Inequalities Involving Integers

Given that \(\frac{2-x}{4}\le 3+x<11\) and \(0 < y < 5\), where \(x\) and \(y\) are integers, find the

1. range of values of \(x\).
2. greatest possible value of \({{\left( x+y \right)}^{2}}\).
3. least possible value of \((x+y)(x-y)\).