Question 2:

A 1D-array with distinct elements can be used to represent a set. Write an interactive Java program that

prompts for and reads the sizes of two 1D-arrays and then it prompts for and reads distinct values in each of the

two arrays. It then does the following:

. It calls a static method theUnion passing to it the two arrays. The method returns a reference to a 1D-

array that contains the set union of the two arrays.

. It displays the elements in the set union.

Note:

. Your program must use appropriate loops.

. Assume that the sizes read are each greater or equal to zero.

. Enter distinct elements in the two arrays and do not test whether the elements are distinct or not.

(i.e., assume that the user will enter distinct elements).

. The array reading must be done in the main method and not in the theUnion static method.

. The method theUnion must not contain calls to I/O methods.

. The created set union must have distinct elements (i.e., each element must not be repeated.)

Sample program runs:

Question 1: (a) A model of world population, in billions of people, is given by the equation: population = 5.5 * e0.017st Where t is the time in years t 0 represents January 1993, t1 represents January 1994, etc). Write a Java static method getYearAndPopulation that takes as input a future population x in billions of people, it then returns the year in which the world population will exceed x and the world population in that year. Your method must throw an IllegalArgumentException if its input is less or equal to 5.5 Note: Since a Java method returns either no value or it returns a single value, use a two-element array to return the two values