I need help with problems a-c

Exercise 3.6.2: Cartesian product of two small sets. Define the sets X and Y as: X = {*, +.9 and Y = {52, 67). Use the definitions for X and Y to answer the questions. Write the set X Y using roster notation. Give an element of X4. Express your answer as a 4-tuple, not as a string Give an element of X x X x Y x Y X. Express your answer as a 5-tuple, not as a string. Exercise 3.6.2: Cartesian product of two small sets. Define the sets X and Y as: X = {*, +.9 and Y = {52, 67). Use the definitions for X and Y to answer the questions. Write the set X Y using roster notation. Give an element of X4. Express your answer as a 4-tuple, not as a string Give an element of X x X x Y x Y X. Express your answer as a 5-tuple, not as a string