Company Game top has 100 million shares trading at a price of $10 per share. On the 21st of June 2020, GameStop announces that it will pay a dividend of $2 per share. The cum dividend date is the 5th of September 2020, the Ex-dividend date is the 6th of September 2020, and the date at which the dividend will be paid is on the 30th of September 2020.

 a) If there are no taxes, determine the price per share: i) on the 23rd of June 2020, on the 5th of September 2020, on the 7th of September 2020, on the 3rd of October 2020.

 b) If the tax rate is 30%, determine the price per share on the same dates as in a).