Question: FOR JAVA Write a program that has the following methods. a. int firstDigit(int n) , returning the first digit of the argument b. int lastDigit(int

FOR JAVA

Write a program that has the following methods.

a. int firstDigit(int n) , returning the first digit of the argument

b. int lastDigit(int n) , returning the last digit of the argument

c. int digits(int n) , returning the number of digits of the argument

For example, firstDigit(1729) is 1, lastDigit(1729) is 9, and digits(1729) is 4.

d. a main method that tests all the above method

Note: Treat the number as integer and do not use method in Integer to convert the number into a String

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