please solve all and explain

(c) Robustness is one of the software design principles. It can be seen in Figure 2 below. Figure 2: login scenario As a programmer, you are required to include exception handling in an application that will check for login credentials following the main success scenario and scenario extensions. Based on that, answer the questions below: i. Write a method getLogininput () that will accept user input. ii. Create another method istoginvalide(String emailname, String password) that will throw InvalidEmailexception. Note: The only valid username and password are "farhanwajdi@yahoo.com" and "pass\#12" respectively