8. The marketing VP of a company making computers, wants to decide on an appropriate research design to find out whether advertising campaign A will generate more sales than advertising campaign B. What research design would you recommend? Justify your choice? 9. The Federal Reserve (the Fed) controls the currency in the US. Recently, the Fed is considering some changes in the currency design. One change involves paper money, which is currently all the same sizes and shape (no matter what the bill's denomination