Question: Problem 1: Let X = {1, {1}, {1, 2}, 2}. 1. What is |X|? 2. Which of the following are true? a. 2 X b.

Problem 1: Let X = {1, {1}, {1, 2}, 2}.

1. What is |X|?

2. Which of the following are true?

a. 2 X

b. {2} X

c. {2} X

d. 1 X

e. {1, 2} X

f. {1, 2} X

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