Some missions to Mars are described in Table 5.

a. Identify the individuals.
b. Identify the variables.
c. Identify the observations for each variable.
d. Compute the ratio of cost to launch mass (in millions of dollars per pound) for each mission. Round to the third decimal place.
e. Which mission has the least ratio of cost to launch mass?

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Table 5 Missions to Mars Cost Launch (millionsMass Mission Name Mars Polar Lander Opportunity Mars Reconnaissance Mission Outcome of dollars) (pounds) Lander Failure Rover Success 110 400 640 408 Orbiter Yinghuo-1 Mars Orbiter Mission Orbiter Success Orbiter Success Orbiter Failure 720 163 74 4810 29,100 2948