LAB4: Objects \& Methods Consider the following UML diagram of the TV class: Question 4.1: Write a TV class (without main method) and declare its instance variables. The Default channel is 1 , the default volume level is 1 and the TV is off. 1. The turnOn method turns on this TV. 2. The turnOff method turns off this TV. 3. The setChannel method sets the new channel if the TV is on and the new channel is between 1 and 120 . 4. The setVolume method sets the new volume if the TV is on and the new volume is between 1 and 7 . 5. The channelUp method increases the channel number by 1 if the TV is on and the channel is less than 120 . 6. The channelDown method decreases the channel number by 1 if the TV is on and the channel is greater than 1. 7. The volumeUp method increases the volume number by 1 if the TV is on and the channel is less than 7 . 8. The volumeDown method decreases the volume number by 1 if the TV is on and the volume is greater than 1. 9. In the main class TestTV: a. create an object tv1 e. create an object tv2 b. turn on the tv1 f. turn on the tv2 c. set the channel to 30 g. increase the channel of the tv2 d. set volume to 3 h. increase the volume of the tv 2 i. Show the channel and the volume of tv1 and tv2. tv1's channel is 30 tvl's volume is 3 Run: tv2's channel is 3 tv2's volume is 2 Question 4.2: Modify the code in order to initialize the first tv by the same values (channel =30 and volumeLevel =3 when creating the tvl)