Suppose Greg Norman has the following scores in his last eight rounds of golf:

71, 68, 64, 73, 69, 62, 75, 69.

(a) If Greg computed his average score over these eight rounds, would he be computing a descriptive or an inferential statistic?

(b) If Greg used these scores to predict his overall scoring average for the 1993 season, would he be using descriptive or inferential statistics?