<prompt> bei 100, kiwango cha kodi 0.2Kuandika kazi ya mahesabu ya bei ya bidhaa na kodi.  <response>: Here is a function written in Python that calculates the final price of a product including tax:pythondef calculate_price_with_taxprice, tax_rate: :param price: float, the price of the product :param tax_rate: float, the tax rate as a decimal e.g. 0.2 for 20 tax :return: float, the final price of the product including tax tax_amount price tax_rate final_price price tax_amount return final_price example usageprice 100tax_rate 0.2final_price calculate_price_with_taxprice, tax_rateprintThe final price of the product including tax is:,final_priceThis function takes in two parameters: price and tax_rate. It calculates the tax amount by multiplying the price by the tax rate, then adds the tax amount to the price to get the final price of the product including tax. In the example provided, the final price will be 120 100 100 0.2. 