Assume that our total wealth of $$25,000$ is invested in three stocksOur decision was to invest $$3,750$ in stock $1,$ $$13,750$ in stock $2,$ and $$7,500$ in stock $3$A year later, when we liquidate our portfolio, the rates of return on the three stocks turned out to be R$1=13\%,$ R$2=4\%,$ and R$3=15\%$What was the rate of return on our portfolio?$0$ a$.9\mathrm{.}1\%0$ b$.8\mathrm{.}12\%$ O c$.8\mathrm{.}65\%$ d$.7\mathrm{.}90\%0$ e$.8\mathrm{.}91\%$