Please explain the answer of the following problem
Problem- In Kimel v. Florida Board of Regents, the Supreme Court held that:
Part 1- A state could not be sued for violations of the ADEA.
Part 2- a state could not be sued for violations of the Fourteenth Amendment.
Part 3- a state could be sued for violations of Title VII.
Part 4- a state could be sued in federal courts, but only for age discrimination.
I need experts help to explore the answer of the above problem.