Dilan, Inc. is a publicly$-$traded cybersecurity company, and it is considering a rights offer. The ex$-$rights price is $$42$ on the ex$-$rights day, whereas the rights$-$on price was $$48.$ The company has $6$ million shares outstanding currently, and they plan to raise $$12$ million through the rights offering. Calculate the number of rights required for a shareholder to be eligible to purchase $1$ share from the offering. Assume that each share will count as one right.