1. discrete
    2. continuous
    3. continuous
    4. discrete
    5. discrete

    1.  discrete
    2. continuous
    3. discrete
    4. discrete
    5. continuous

    1. {0.1.2}
    2. an interval (a,b) (answers vary)
    3. an interval (a,b) (answers vary)
    4. {4,5,6,7}
    5. {2,3}