In 2010, there was an explosion on a BP oil rig in the Gulf of Mexico. The following data represent the closing price of BP stock at the end of each month in 2010.

(a) Construct a time-series plot of the data.
(b) Percentage change may be found using the formula
Percentage change = P2 - P1 / P1, For example the percentage change in price from 1/10 to 2/10 was Percentage change = 43.53/45.22 = -0.037 = -3.7%
That is, BP stock declined 3.7% from January to February in 2010. The extent of the damage of the explosion was determined in June, 2010. What was the percentage change in the BP stock price from May to June, 2010?

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Date Closing Price Date Closing Price 45.22 1/10 7/10 32 2/10 43.53 8/10 28.97 3/10 34.24 46.69 9/10 33.93 4/10 42.66 10/10 33.27 5/10 35.72 11/10 6/10 24.02 12/10 36.74