Multiplying Intervals
<p>I'm trying to create this method, but for some reason it isn't working...</p>

<pre><code>public static Interval multiply(Interval x, Interval y) {
   int min = Math.min(x.lo * y.lo, x.hi * y.hi, x.hi * y.lo, x.hi * y.hi);
   int max = Math.max(x.lo * y.lo, x.hi * y.hi, x.hi * y.lo, x.hi * y.hi);
   return new Interval(min, max);
</code></pre>

<p>It has something to do with the Math.min/Math.max, but I looked it up, so I'm not sure how I'm not using it correctly??</p>
