How many levels are there in a hierarchy chart?

Which of the following is the MINIMUM number of required drives in a RAID 5 configuration?

A. 2 B. 3 C. 4 D. 5

Now suppose further that p1 points to a node of type N in the middle of a linked list (neither the first nor the last node). Write code that deletes the node after the node p1 points to in the linked list. After the code is executed, the linked list should be the same, excepting the specified node is missing.

Suppose you have the following struct definition and typedef statements in your program:``` struct N { double d; N *next; }; typedef N* node_ptr; node_ptr head, p1, p2; ```