Please answer the following question in details.

class StockQuote \{ lastPrice: double midPrice: double \} class optionQuote extends StockQuote \{ contractMultiplier = 100 \} class stockstatsCalculator \{ double computeNetLiq(quantity: int, quote: StockQuote) \{ return quantity * quote. lastPrice \} class OptionstatsCalculator extends StockstatsCalculator \{ double computeNetLiq(quantity: int, quote: OptionQuote) \{ return quantity * quote.contractMultiplier * quote.midPrice \} How would you refactor the code to make it less error prone? Please provide your answer in the following editor