Question 27 1 pts In a circular doubly linked list, let's assume that the last node is pointed to by last_pt. If so, the following is true last-pth.link_pt^.content--head_pt^.content O head-pth.back-linka, content == last-pth.content O last ptA link_ptA content head_ptA.back_linkA. content O both a) and b) Question 28 1 pts Assume that in a linked list temp_pt is pointing to a node. We can change the temp_pt (e.g. use it for another purpose) only if O there is another accessible pointer pointing to the node in question O the node in question has no relevant content we can always use temp-pt for another purpose O we cannot use temp_pt as long as the node in question is not disposed of