Which of the following is not true about designing classes? in order for class information to be printed instead of a memory address, a tostring method should be declared. the constructor must be declared as public. all class variables should be declared as private. to test for equality the programmer should define an equals method. all methods should be declared private.

Write a program that prompts the user to input a string. the program then uses the function substr to remove all the vowels from the string. for example, if str = "there", then after removing all the vowels, str = "thr". after removing all the vowels, output the string. your program must contain a function to remove all the vowels and a function to determine whether a character is a vowel.