its need to be coded in Java

A string contains the information of cars. The string has the following format: "brand1.model1.price1, fuel_efficiency1.brand2.model2,price2 fuel efficiency2..." 1. Write a method named avgPrice that takes a String in the above format and returns the average price per car. 2. Write a method famed efficientCars that takes a String in the above format and returns the number of cars with fuel efficiency larger than 40