See this implementation of a hash function. It will be used for putting C$-$style null$-$terminated char $*$ strings in a hashtable:Which of the following statements are true?Pick all that applyThis is an invalid hash function, because hash function should return a bitmapThis is a good hash function because it returns different values for different stringsThis is a bad hash function because it returns the same value for all strings of the same length.This will case the hashtable implementation to crash because it can return the same hash value for different stringsThis will cause the hashtable implementation to be inefficient because it will cause the same hash value to be returned for many different strings