Richard must decide how to allocate the capital in his portfolio. Richard has $49,000 available to invest. He finds the rates of return for four stocks for the past 12 years and the results are given below. Richard plans to invest 25% of funds in each stock.

a. how much will he invest in each stock?

b. the expected value Richard's portfolio is what?? (round to nearest 100th)

c. The standard deviation of Richard's portfolio is what? (round to nearest 100th)

Year	Stock A (%)	Stock B (%)	Stock C (%)	Stock D (%)
1	-4.460	-14.540	4.560	-1.960
2	9.080	26.080	-6.272	4.810
3	12.880	37.480	-9.312	6.710
4	12.880	37.480	-9.312	6.710
5	-13.160	-40.640	11.520	-6.310
6	16.280	47.680	-12.032	8.410
7	17.080	50.080	-12.672	8.810
8	13.500	39.340	-9.808	7.020
9	8.340	23.860	-5.680	4.440
10	10.080	29.080	-7.072	5.310
11	-5.070	-16.370	5.048	-2.265
12	-5.160	-16.640	5.120	-2.310

I'd like to get a better understand of the formula to calculate this, using the standard financial calculators. Thanks in advance!