Assume you just invested $$130,000$ in a high$-$rise condo venture in downtown Austin, one of the top $10$ hottest real estate markets in the country. The developers promise a rate of return of $21\%$ per year for as long as you have your money invested. $($a$)$ How much interest will you receive at the end of $1$ year, and $($b$)$ what is the total amount you will have after $1$ year?