I $($Math: pentagonal numbers$)$ A pentagonal number is defined as $n\frac{3n-1}{2}$ for $n=1,2,$dots, and so on$.$ Therefore, the first few numbers are $1,5,12,22,...$ Write a method with the following header that returns a pentagonal number:

public static int getPentagona$1$Number$($int $n)$

For example, getPentagona$1$Number $(1)$ returns $1$ and getPentagona$1$ Number $(2)$ returns $5.$ Write a test program that uses this method to display the first $100$ pentagonal numbers with $10$ numbers on each line. Use the $\%7d$ format to display each number.