Question: 1. Suppose the suppliers-pans-projects database is to be represented by means of a single containment hierarchy. How many possible such hierarchies are there? Which one is best?
2. Consider a variation on the suppliers-parts-projects database in which, instead of recording that certain suppliers supply certain parts to certain projects, we wish to record only that
(a) certain suppliers supply certain parts,
(b) certain parts are supplied to certain pro-jects, and
(c) certain projects are supplied by certain suppliers. How many possible 00 designs am there now (with or without containment hierarchies)?