implemented Bullet class

package com.example.a8_bitinvader;

import android.content.res.Resources;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

public class Bullet extends Sprite {

    /**

     * Creates Bullet object using Sprite constructor

     */

    public Bullet(int xPos, int yPos, int xVel, int yVel, Resources res) {

        super(xPos, yPos, xVel, yVel);

        spriteImage = BitmapFactory.decodeResource(res, R.drawable.red);

        spriteImage = Bitmap.createScaledBitmap(spriteImage, screenWidth, screenHeight, false);

    }

}

package com.example.a8_bitinvader;

public class Projectile {

    private int velocity;

    int x;

    int y;

    int image;

    int screenW;

    int screenH;

    /**

     * Projectiles from player only go upward

     * @param velocity of the projectile

     */

    public Projectile(int xp, int yp, int img, int velocity) {

        this.velocity = velocity;

    }

    /**

     *

     * @return Velocity of projectile

     */

    public int getVelocity() {

        return velocity;

    }

}