The output of the following code is:

System.out.println(Math.ceil(6.4) + Math.floor(-1-2));

1. 3.0
2. 4
3. 3
4. 4.0

Write a Java expression for the following:
       |x² + 2xy|

Give the output of the following:
       Math.sqrt(Math.max(9,16))

Write the return data type of the following functions:

1. startsWith()
2. random()