A Company's Annual Report States That the Prices of Its

Short Answer

A company's annual report states that the prices of its common shares had changes of 23%, 10%, -15%, and 5% during the past 4 fiscal years. If the shares were trading at $30.50 just after the 5% increase in the most recently completed year.
a) What was the price of the shares at the beginning of the 4-year period?
b) How much (in dollars and cents) did the price decline in the third year?