A Student executes the given program segment and it results in 1.0, irrespective of the value of n. State the type of the error, write the correct statement:

void solve(int n) 
{ double power=Math.pow(n, 2/3); 
System.out.println(power); 
}

Write the return data type of the following functions:

1. startsWith()
2. random()

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