Before we can determine what are being asked, let's first identify the equivalent of an inch to a yard. We get,
Since we are asked to answer in yards, let's convert the given measures of Gray Fabric and Burgundy.
a.) Gray Fabric = 523 in.^2 = 0.40 yd.^2
b.) Burgundy Fabric = 1318 in.^2 = 1.02 yd.^2
c.) Total yards of fabric Emily will buy = 0.40 yd.^2 + 1.02 yd.^2 = 1.42 yd.^2