Write a class Block that creates a block (Duh..)
The constructor should take an array as an argument,
this will contain 3 integers of the form [width, length, height] from which the Block should be created.
Define these methods:
`getWidth()` return the width of the `Block`
`getLength()` return the length of the `Block`
`getHeight()` return the height of the `Block`
`getVolume()` return the volume of the `Block`
`getSurfaceArea()` return the surface area of the `Block`
Block b = new Block(new int[]{2,4,6}) -> creates a `Block` object with a width of `2` a length of `4` and a height of `6`
b.getWidth() // -> 2
b.getLength() // -> 4
b.getHeight() // -> 6
b.getVolume() // -> 48
b.getSurfaceArea() // -> 88
Note: no error checking is needed