Task 1.
Create a select with options "cat", "dog", "bird", a button, and a div.
Using switch, display the number of the animal:
"cat" — "1", "dog" — "2", "bird" — "3".
Task 2.
Create an input type="text" and a button.
If "admin" is entered — change the button background color to red,
if "boss" — to blue,
if "client" — to green. (red, blue, green)
Task 3.
Create an input type="text", a button, and a div.
If "km" is entered — display "kilometer",
"m" — "meter",
"cm" — "centimeter".
Task 4.
Create a select with options "easy", "medium", "hard", "expert" and a div.
Using switch, display the number of lives: 5, 3, 2, 1.
Task 5.
Create a select with options "breakfast", "lunch", "dinner", a button, and a div.
Using switch, display the meal time: "8:00", "13:00", "19:00".
Task 6.
Create a select with options "kg", "g", "t" and a div.
Using switch, display the full name of the unit:
"kilogram", "gram", "ton".
Implement it in real time, i.e., when the value in the select changes.
Task 7.
Create a select with options "+", "-", "*", "/" and two input type="number",
a button, and a div.
Using switch, perform the selected operation and display the result.