The following table lists prices of Amazon options in January 2018 when Amazon stock was selling for $1,300.

Expiration Date	Exercise Price			Call Price			Put Price
April 2018	$	1,200		$	132.70		$	31.10
		1,300			73.20			70.10
		1,400			33.00			134.20
July 2018	$	1,200		$	161.70		$	53.55
		1,300			104.00			96.00
		1,400			62.55			156.05
January 2019	$	1,200		$	210.00		$	88.05
		1,300			155.35			133.25
		1,400			112.00			190.00

Suppose that by January 2019, the price of Amazon could either rise from its January 2018 level to $1,300 1.28 = $1,664.00 or fall to $1,300/1.28 = $1,015.63.

a. What would be your percentage return on a January expiration call option with an exercise price of $1,300 if the stock price rose? (Round your answer to 2 decimal places.)

b. What would be your percentage return if the stock price fell? (Negative value should be indicated by a minus sign.)

c. Which is riskier: the stock or the option?