What criteria determine cases that are heard by the federal judiciary?

Help? I'm stuck on my government homework. :(What criteria determine cases that are heard by the federal judiciary?
The federal judiciary has jurisdiction over cases which involve:





1. Federal questions: i.e. a case involving questions arising out of the U.S. Constitution, a treaty, or a federal statute





OR





2. Diversity of citizenship lawsuit involving:


(a) citizens of different states,


(b) foreign country (plaintiff) and citizens of states (defendant), or


(c) citizens of state, and citizens of foreign country





Note that in diversity cases the minimum amount in controversy must exceed $75,000, under the current statute. This amount is set by Congress and can be changed.What criteria determine cases that are heard by the federal judiciary?
The two principal grounds for federal jurisdiction are: (1) the litigation involves a federal question, i.e., the assertion of rights under a federal statute or the United States Constitution (federal question jurisdiction); and (2) the litigation involves a dispute between a citizen of one state and a citizen of another state or a foreign country (diversity jurisdiction).

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