Lisa is investing $12000 and wants a portfolio that is 70% stocks and 30% bonds. She has decided to accomplish this using just two ETFs:a stock ETF trading for $50 a share and a bond ETF trading for $100 a share What should she do to meet her asset allocation goal? O Purchase 168 shares of the stock ETF and 18 shares of the bond ETF Purchase 168 shares of the stock ETF and 36 shares of the bond ETF O Purchase 70 shares of the stock ETF and 30 shares of the bond ETE Purchase 84 shares of the stock ETF and 18 shares of the bond ETF