With an investment principal of $100, you are building a portfolio of risky asset P and riskfree asset F. The expected return of your target portfolio should be 18.5% (p.a.). Then, what is the volatility(a) of your target portfolio? (1) 18%; (2) 19 %; (3) 20%; (4) 21%; (5) 22%; (6) 23%: (7) 24%; (8) 25%; (9) 26%: [o(r): standard deviation of the rate of return] E(r) o(r) Risky Riskfree (P) 14% 5% 14% 0