1. Our Pac-man, and the ghosts can move outside the boundary of the screen. Limit the movements of all the characters inside the screen. This can be done by pre.ending the movement from har pening if a s.en takes the character outside the screen. 2. Assign the four ghosts different colors using ghost0.png, host1 png, ghost2.png, and ghost.png. This was optional in Lab U, but mandatory in Assignment 1. C. Add a new property to Pac-man called invincible. Initially, the value should be false. 4. Add a new super-pallet to the screen. The pallet should re drawn on a random block position out of the 10 x 10 blocks. Every time you run the game, the super-pallet should be in a different location.