This problem has two parts, Part A and Part B. Read the proof, and then answer both parts Given: (a + b)3 Prove: (a + b)) = a* + 3ab + 3ab3 + 63 Statements Reasons 1 (a + b) Given 2 ( a + b ) (a + b) (a+ b) Rewrite the power as a product of the basa 3 (a + b ) (a + ab + ab + 6?) Distributive Property 4 (a + b) (a + 2ab + 6-) Combine like terms. (blank] Distributive Property 6 a3 + 3a2b + 3ab?+ 63 Combine like terms. : Which statement correctly fills the blank in Statement 5 to complete the proof? B: Which analysis of the proof correctly describes the efficiency of steps? Select one answer for part A and one answer for part B DAd' + 2a b + ab- + a-b + 2ab? + 63 O A a(a2 + 2ab + 62 ) O A (a + 6) ? ( a2 + 2ab + 62 ) O B: It was not necessary to use the Distributive Property in Statement 3 because it was used again in Statement 5. D A b(a2 + 2ab + 67 ) O B: It was necessary to use the Distributive Property in order to efficiently show that both sides of the equations are equal