Need help with Statistics please

If anyone can help me solve this problem it would be great. I have no idea where to start as this is like a second language to me. The problem is as follows:

Does loveatatin ( cholestrol drug) reduce the risk of a heart attack? In a Texas study, reserachers gave lovastatin to 2,325 people and an inactive substitue to 2,081 people (avg. age 58). After 5 years 57 of the lovastain group had suffereda heart attack, compared to 97 for the inactive pill.

A) state the hypothesis. B) State the decision rule. C) Find the sample proportions and z test statistic. D) Make a decision

E.) Is normaility assured F.) Is the difference large enough to be important G.) What else would medical researchers need to know before prescribing this drug widley?