design the algorithm that would solve them and then implement the algorithm in java.

Problem 3: Write a program that asks the user to input: The number of gallons of gas in the tank The fuel efficiency in miles per gallon The price of gas per gallon Then print the cost per 100 miles and how far the car can go with the gas in the car. Problem 4: Write a program that asks the user to enter the name of his or her favorite city. use a String variable to store the input. The program should display the following: The number of characters in the city name the name of the city in all uppercase letters the name of the city in all lower case letters the first character in the name of the city