Could you help me to answer this one (if it is posssible with excel).

2. An insurance company has an equal number of claims in each of three territories. In each territory, only three claim amounts are possible: $100, $500, and $1000. Based on the company's data, the probabilities of each claim amount are: Claim Amount $100 $500 $1000 Territory 1 0.90 0.08 0.02 Territory 2 0.80 0.11 0.09 Territory 3 0.70 0.20 0.10 Calculate the standard deviation of a randomly selected claim amount