1. Complete the classes Queen and Board for the Eight Queens problem. 2. Revise the program that you just wrote for the Eight Queens problem so that it answers the following questions: a. How many...

1. Complete the classes Queen and Board for the Eight Queens problem.

2. Revise the program that you just wrote for the Eight Queens problem so that it answers the following questions:

a. How many backtracks occur? That is, how many times does the program remove a queen from the board?

b. How many calls to is Under Attack are there?

c. How many recursive calls to place Queens are there?