Please answer all numbers and show complete solutions, thank you!

Problem 16: Four cards are drawn together from a deck of 52 cards. Find the probability that all are of the same suit. A. 0.01056 C. 0.0769 B. 0.25 D. 1.00 Problem 17: In how many ways can 3 Americans, 4 Frenchmen, 4 Danes and 2 Italians be seated in a round table if those of the same nationality sit together? A. 6,912 C. 41,472 B. 20,736 D. 35,430 Problems 18, 19, 20: A number consisting of three different digits is to be formed using the integers 2, 3, 4, 6, 7, 8. 18. How many of the numbers are greater than 700? A. 80 C. 40 B. 720 D. 144 19. How many numbers are odd? A. 80 C. 86 B. 72 D. 10 20. How many numbers begin and end with an even number? A. 54 C. 48 B. 28 D. 36