Consider the following program segment and answer the questions below:

class calculate

{
  int a; double b; 
  calculate()

  {

  a=0; 
  b=0.0;

  }

  calculate(int x, double y)

  {

  a=x;
  b=y;

  }

void sum()

{

  System.out.println(a*b);

}}

Name the type of constructors used in the above program segment?

Design a class to overload a function series( ) as follows:

(a) void series (int x, int n) – To display the sum of the series given below:

x¹ + x² + x³ + ………. xⁿ terms

(b) void series (int p) – To display the following series:

0, 7, 26, 63 ………. p terms

(c) void series () – To display the sum of the series given below:

1/2 + 1/3 + 1/4 + ………. 1/10