Do anyone knows how to write these as java language step by step, thank you very much!!!!

Step 4 Switch roles: the navigator should drive and the driver should navigate. Add the following method to class Lab4: /**Input a double value and return the closest int value. The int value should be rounded so that if the fractional value is 0.5 or greater, it rounds up and if it is less than 0.5 *it rounds down int roundDouble You can write this method without using a conditional statement, and using a mathematical operation instead. See if you can find the short way to write it If not, you may use a conditional statement Step 5 Here is a bigger challenge. The method roundDouble does what is called "biased rounding" because it always rounds 0.5 up. For "unbiased rounding", if the fraction part is exactly 0.5 it should only be rounded up half of the time. The accepted solution is to always round to the even integer, so 3.5 becomes 4 but 2.5 becomes 2. Create a method unbiasedRoundDouble that does unbiased rounding. Remember to include a comment above your method. This method will require an if statement. Show your roundDouble and unbiasedRoundDouble methods to your lab assistant