(a) State the results (a) – (e) of Theorem 2.3.1 for an indexed family (b) Pr...

(a) State the results (a) – (e) of Theorem 2.3.1 for an indexed family

(b) Prove part (e) of these restated results directly, using the definitions of intersection and union for indexed families.

(c) Give a proof of part (d) of the restated results that uses part (e) as the key step of the proof.