A stock price has a price of $7.50 per share at the beginning of the week. At the end of the week, the stock price is $9.45 per share. (a) What is the percent increase in the stock's price per share for the week? (b) The $7.50 price per share represents a 40% decrease from the price per share last week. What was the price per share last week? (c) The stock price is projected to increase by 40% from the $9.45 per share price by the end of the year. What is the projected price of the stock?