Answer the following: 1. Express set X and set Y using the: a. roster method b. Set-builder notation 2. Determine the cardinality of set X and set Y. 3. List all the subsets of set X and set Y. 4. Are set X and set y equivalent sets? Why? 5. Are set X and set Y equal sets? Why? 6. Find the union of sets X and Y. 7. Find the intersection of sets X and Y.​