20) Translate the following phrase into an algebraic expression: "the product of n and 7 divided by 16."21) What property is illustrated in the following expression: a(1) = aA) Multiplicative IdentityB) Associative Property of AdditionC) Commutative Property of AdditionD) Multiplicative Property of ZeroE) Commutative Property of Multiplication22) What property is illustrated in the following expression: (x + 4) + y = x + (4 + y)A) Multiplicative IdentityB) Associative Property of AdditionC) Commutative Property of AdditionD) Multiplicative Property of ZeroE) Associative Property of Multiplication