Please answer Q 1.

1. Let X-{{!}, {1,2}.2.4), answer the following questions. (a) X-? (b) true false 1 EX (c) true false {1} SX (d) true false EX (el true false {0) SX (f) true false {1.2) SX true false {1,2} EX 2. Find the power set for et A-0.6.c. 3. Compute the value for each of the following expressions, (a) 19 div 7 (h) - 111 div 11 (c) 19 mod 7 (d) -111 mod 11 (c) (44 +38') mod 6 4. Decide whether cach of these integers is congruent to 5 mod 17. (a) 80 (b) 103 (C) -29 (d) - 122 5. Find the prime factorization of each of these interes (h) 126 6. What are the god and lem of these pairs of integers? (a) 3 58-7 and 2.3.5" () 11-13-17 and 2.37.56-7 7. Prew pha the following are in l. Sturth