Is there a BST B and a query value X such that the search for X in B visits the following sequence of key values in the given order?

a. 20, 100, 30, 150, 70 You need to enter either YES or NO on the answer sheet.
(b) Is there a BST B and a query value X such that the search for X in B visits the following sequence of key values in the given order? 20, 100, 30, 150 You need to enter either YES or NO on the answer sheet.
(c) Is there a BST B and a query value X such that the search for X in B visits the following sequence of key values in the given order? 20, 100, 30 You need to enter either YES or NO on the answer sheet.
(d) Is there a BST B and a query value X such that the search for X in B visits the following sequence of key values in the given order? 20, 100 You need to enter either YES or NO on the answer sheet.