b) (i) How much money should you have deposited in the bank 5 years ago in order to have $1000 today, given that the interest rate has been 8% per year over this period? (4mks) (ii) Which of the following sets are empty? 1. A = {x: x + 8 = 8, XER} 2. B = {x: x = 6, XEZ} 3. C= {x:x + 9 = -14, XEN} 4. D= {x: 6x = -5, xEQ} c) Rationalize the denominator and simplify: (i) 2/38 (ii) (54-24)/6 (iii) [x(x + 1)]/x (4mks) (3mks)