1 . Are these statements true or false ? The universe of discourse is the set of all people , and T ( x , y ) means " X and y are twins . " Explain how you determined you solution a . V X - T ( x , X ) Everyone does not have a twin - True b . ly Tly . ) Someone has a twin - True C . EX Vy T ( x , ) Everyone has a twin - False d . V X -Zy T ( X , Y ) True e . 7 X -ly T ( X , y ) someone does not have a twin - True f . V X - Vy T ( X , y ) True This is : similar to L ( x , y ) described just before Example 2 . 1 4 and to Exercise 6 in Section 2 1 of your SNHU MAT 299 textbook