1. a

    Closed
    #178623580 1 0 0 0

  2. a

    Closed
    #178608278 7 2 0 0

  3. correct

    Closed
    #178608187 2 2 0 0

  4. (no comment)

    Closed
    #178541714 0 1 0 0

  5. (no comment)

    Closed
    #178541680 0 1 0 0