My granddaughter has asked me how to invest the money she'll contribute to her employer's retirement savings plan at her first job. I suggested she either go with a 2050 target-retirement fund or divide her money as follows: 40% in an S&P 500 index fund, 40% in a small-cap index fund and 20% in an international stock index fund. Do you think she should go with the first option, the second or do something else? -- Don G.