hi, can i get help with this two methods in java

this are the class variables

public class Note {

/** Static Constants */

public static final int DEFAULT_INTENSITY = 50;

public static final int REST_PITCH = 128; // First illegal pitch, used for rests.

private static final int PITCHES_PER_OCTAVE = 12;

private static final String[] NOTE_LETTERS = {"c","c#","d","d#","e","f","f#","g","g#","a","a#","b"};

private static final double MIN_DURATION = 1.0/64, // One sixty-fourth

MAX_DURATION = 8.0; // Eight whole notes

/** Fields (Immutable) */

private final String pitch="f6";

private final int midiValue=42;

private final double duration=0.02;

/**

* Returns a (new) note with the same duration, but transposed by the given interval.

*

* @param interval the interval to transpose by

* @throws IllegalArgumentException if note is transposed beyond valid bounds [c0, g10]

* @return the transposed note

*/

public Note transpose(int interval) {

// TODO

return null;

}

/**

* Returns a string representation of this Note.

* It should follow the format found in songs/InMyLife.song, namely:

* For a Note with pitch "g#4" and duration 1.0625 -> "g#4 x 1.0625"

* NB1: Identical spacing and format are important!

* NB2: For a "rest" note, the same format must be used (including duration).

*

* @return the string representation

*/

@Override

public String toString() {

// TODO

return null;

}