For Exercises 65–71, do the following.
70. Commodity Prices. The financial company Bloomberg (www.bloomberg.com) reported that, on June 4, 2014, the prices in dollars for the following commodities were oil ($102.79, +0.13%), gold ($1243.62, −0.110%), and wheat ($616.25, +0.61%). Do (a)–(d). What is the observation for gold?