Problem 4. Use the definitions for the sets given below and definitions for common sets given in the lecture slides to determine whether each statement is true or false. A = { x ∈ Z : x is an integer...

Problem 4. Use the definitions for the sets given below and definitions for common sets given in the lecture slides to determine whether each statement is true or false.

• 
  A= {x∈ Z :xis an integer multiple of 3}.


• 
  B= {3,9,21}


• 
  C= {2,11,4,14,2}


• 
  D= {x∈ R : 1< x="">5}


• 
  E= {∅}

4(d)B⊆C

4(e) |C| = 5

4(f)C⊂C