Which of the following(s) can be used to access the last element of a vector v?
a) v.end() b) v.cend() c) both v.end() and v.cend() d) vectors do not have a function to access the last element
a) v.end() b) v.cend() c) both v.end() and v.cend() d) vectors do not have a function to access the last element