Show how to replace the related stack with a single reference in an in-order traversal by removing the accompanying stack. (Hint: The items below the stack top are decided by the stack top; we just need to know the top of the stack.) 12.23 Which additional traversals can be reformulated by substituting a single reference for their Linear structure? How does this modification affect how complicated each iteration is?

Question 3 a. "Queues and stacks are used in many real-life situations". In your own words, clearly distinguish between queues and stacks; and give one example of real-life situations in which each of them is used. b. In an array-based implementation of a stack, which end of the contents of the array represent the bottom of the stack and why? c. If the size of circular queue K is 4 with indices number from 0 to 3 what would be the state of the queue after the following set of 8 operations below. Show in a diagram the state of queue K after each of the 8 operations. K. enqueue (“F"), K. enqueue (“R"), K. dequeue(), K. enqueue (“P"), dequeue(), K.front(), K. enqueue (“Z"), K. enqueue (“G") d. Why are insertions and deletions at the logical end of the array more efficient than insertions and deletions in the interior of the array?

Please refer to this textbook: “Cormen et al., Introduction to Algorithms, 3rd Edition”   And answer the following questions: Question:15

Please help solve the python problem, thank you