The following statements are made about (right) cosets of a subgroup H of a group G. Say whether each statement is true or false and give a reason for your answer. (i) H itself is a coset. (ii) Every element of G belongs to a coset. (iii) If y is in a coset Hx, then Hy = Hx. (iv) Two cosets Hx and Hy are either the same, or they are disjoint, HxHy = 0. 1 (v) Hx = Hy if and only if xy-¹ € H.

a.) Explain in your own words what this problem is asking. b.) Explain the meaning of any notation used in the problem and in your solution. c.) Describe the mathematical concept(s) that appear to be foundational to this problem. d.) Justified solution to or proof of the problem.

Let G be a group, and assume that a and b are two elements of order 2 in G. If ab = ba, then what can you say about (a, b)?

he following is a multiplication table for a group G. The product a * b is given in the ble where a is from the leftmost column and b from the top row. Let H e V W X Y 2 = e e V W X W V Y Z X W X Y e W X Z V SOSN e What are the orders of the elements? X 3 Y 2 Y 2 Z X V Y e e X W V W e V Y 3 NS Y ১৯৯ {e, z). Show that this is a subgroup of G. Calculate the right cosets of H. Without calculating the left cosets of H, explain why H is a normal subgroup of G. Construct a multiplication table for the quotient group G/H. Is G/H cyclic? Give reasons. Describe the subgroup Z ≤ G/H generated by the element Hx = G/H. What is the order of (G/H)/Z?