To get the element at the front of a non-empty LinkedList named data, there are at least six methods, other than the toArray( ) methods, in the LinkedList class that you could invoke on data. Give the...

To get the element at the front of a non-empty LinkedList named data, there are at least six methods, other than the toArray( ) methods, in the LinkedList class that you could invoke on data. Give the six method calls. These method calls should not remove the element from data.