Step 1 — Set portfolio weights & compute R_p

Ticker	R_i (%)	σ_i (%)	Weight (%)	w_i·R_i (%)
AAPL	3.4	4.5		0.68
MSFT	2.8	4		0.56
NVDA	5.5	7		1.1
TSLA	4.1	9		0.82
KO	1.2	2		0.24
Totals			100%	—

Your R_p (%) — compute Σ w_iR_i:

Step 1

Step 2

Step 3