From the point of view of the assumptions of scie

From the point of view of the assumptions of science, are there any of the following questions which could not be studied scientifically? If yes, which one(s) and why? If no, why cannot all be studied?

a. In Chicago, is the suicide rate higher among teens or among people in their 40’s?

b. Do women commit suicide for the same reasons men do?

c. Is it morally wrong to commit suicide?