a 7. A person develops a savings plan to accumulate a down payment for a home whereby he or she makes fixed regular deposits into a fund earning compound interest over a defined period such that the balance in the fund is equal to the desired down payment at the end of the period. The financial mechanism by which the person is saving is best described as a: a. Savings Fund. b. Sinking Fund. c. Mortgage Fund. d. Trust Fund 8. Which of the following is not an elementary row operation with respect to a matrix? a. Interchanging two rows of the matrix. b. Multiplying a row in the matrix by any number c. Adding a multiple of one row to a different row of the matrix. d. Moving a row of zeros to the bottom of the matrix. 9. Which of the following descriptions about matrices A and B implies that B is not the reduced form of matrix A? a. That BC = 0 for all matrices C +0 for which the product BC is defined. b. That either A-1 = B or A does not exist. c. That any sequence of elementary row operations reducing A to B also derives A from I. d. That there exists a reduced matrix C, derived from A through elementary row operations, such that C# B