1. Redesign the interface for a hash table to allow the data to be null and to allow multiple elements with the same key. You’ll have to give some thought to the return value for the to get function...

1. Redesign the interface for a hash table to allow the data to be null and to allow multiple elements with the same key. You’ll have to give some thought to the return value for the to get function in the case where there is more than one entry with a given key