Oes capital punishment equate to Cruel and unusual punishment?”

Does capital punishment equate to Cruel and unusual punishment? Discuss Supreme Court and/or legislative rulings regarding the previous question. In addition, discuss whether or not research evidence suggests that capital punishment has the effect of deterring other people from committing murder?
Requirements:
1. Provide two (2) basis of response like journals and internet site articles ending only in .edu, .gov or .org
2. Work Cited Page must have two (2)references in APA writing style format for the about subject.
3. Must be only 2 pages