11.2. Data frame UScereals describes 65 commonly available breakfast cereals in the USA, based on the information available on the mandatory food label on the packet. The measurements are normalized to a serving size of one American cup.

(i) Is there any way to discriminate among the major manufacturers by cereal characteristics, or do they each have a balanced portfolio of cereals?

(ii) Are there interpretable clusters of cereals?

(iii) Can you describe why cereals are displayed on high, low or middle shelves?