A coin toss is usually fair when a coin is tossed, it has a 50% chance of landing on heads, and a 50% chance of landing on tails. In this problem, you will design an unfair coin using the Random class and implement it as a method.

Utilize an instance of the random class, Random r = new Random(), to design an unfair coin.

Write a valid Java method (including a method header) that takes no arguments and returns the string heads 60% of the time and returns the string tails 40% of the time. Your code may use any valid methods in the Random class