causes mood swings that range from the lows of depression to the highs of mania

Paper instructions:
According to the Mayo Clinic, bipolar disorder “causes mood swings that range from the lows of depression to the highs of mania.” There are two main types of bipolar disorders; Bipolar I and Bipolar II Disorder (there is also a Cyclothymic disorder).

Write a short (1-2 pages) essay regarding the main differences between Bipolar I disorder and Bipolar II disorder. In your essay be sure to include the following information:

Description of each disorder.
The main differences between each of the two types.
Explain how the presence, or absence, of manic and/or mixed episodes plays in distinguishing between these two conditions?