Write the bin2Dec(String binaryString) method to convert a binary string into a decimal number (your method should return an integer). Implement the bin2Dec method to throw a NumberFormatException if the string is not a binary string. Test your method in a program that prompts the user to input a binary string and uses your bin2Dec method to print out the decimal equivalent of that string. If the method throws an error, have your program catch it and print "Not a binary string." before terminating.

Write a Regular expression that check whether a string contains an Vowel or not? You have also include the driver code in Java Language. Your driver code should take string from the user.

Write a Java program correctly that generates a report of proof of vaccination against COVID-19 for the peoplewho received their dose of vaccination. Write a program which:1. Display a welcome message.2. Then prompts the user to enter the following:• First name, with first letter uppercase, which is then stores in a variable of type String.• Last name, with first letter uppercase which is then stores in a variable of type String.• Day of birth, set as a number between 1 and 31, which is then stores in a variable of typeint.• Month of birth, set as a number between 1 and 12, which is then stores in a variable of typeint.• Year of birth, set as a number between 1920 and 2006, which is then stores in a variable oftype int.• Day of vaccination, set as a number between 1 and 31, which is then stores in a variable oftype int.• Month of vaccination. set as a number between 1 and 12, which is then stores in a variableof type int.• Year of vaccination, set as a number between 2020 and 2021,…

Using python, please explain 1: A positive integer greater than 1 is said to be prime if it has no divisors other than 1 and itself. A positive integer greater than 1 is composite if it is not prime. Write a program that asks the user to enter an integer greater than 1, then displays all of the prime numbers that are less than or equal to the number entered  The program should work as follows: Once the user has entered a number, the program should populate a list with all of the integers from 2 up through the value entered. The program should then use a loop to step through the list. The loop should pass each element to a function that displays the element whether it is a prime number.