John was asked to write a Java code to calculate the surface area of a cone. The following code was written by him: Surface area of cone is A = πrl

l = $\sqrt{r^2 + h^2}$

class area{
    double area(double r, double h){
        double l, a;
        a = 22.0 / 7 * r * l;
        l = Math.sqrt(r * r + h * h);
        return a;
    }
}

Specify the type of the error in the above program, correct and write the program to be error free.

Consider the following array and answer the questions given below:

int a[] = {12, 10, 8, 4, 6, 2, 3, 5, 7};

(a) What is the output of System.out.print(a[0] + a[5]);?

(b) What is the index (subscript) of the largest element of the array a[]?

Give the output of the following program segment and specify how many times the loop is executed.

String s = "JAVA";
for(i = 0; i < s.length(); i += 2)
    System.out.println(s.substring(i));

Define a class named CloudStorage with the following specifications:
Member Variables:
int acno – stores the user’s account number
int space – stores the amount of storage space in GB purchased by the user
double bill – stores the total price to be paid by the user
Member Methods:
void accept() – prompts the user to input their account number and storage space using Scanner class methods only.
void calculate() – calculates the bill total price based on the storage space purchased using the pricing table provided:

Storage range	Price per GB (Rs)
First 15 GB	15
Next 15 GB	13
Above 30 GB	11

void display() – displays the account number, storage space and bill to be paid.

Write a main method to create an object of the class and invoke the methods of the class with respect to the object.