2. Use the API for the Scanner class (java.util.Scanner) to answer the following: What two lines of code would you write to read a number from keyboard input using a Scanner object with the identifier keyIn and store in the int variable num? a. What Scanner method would you use to get a string value from the input source and store it into a String variable called string1? b. c. What is the difference between the Scanner methods next0 and nextLine)? d. How can you determine if there another token to be read? In other words, which Scanner method would you call to get a true/false response to tell you if there was any more input