3. (40%) Consider the following design requirements: You are asked to design a new APP for iPhone. You are starting the design by creating a welcome screen that is composed of 4 shapes as in the following: BLUE means OFF, YELLOW is ON (lit) - If the User presses HOME button again, Shapes will light up one after the other, in a sequence of abcd and repeat forever +++ - Initial pattern: At the start-up all lights (a,b,c,d) or OFF. - If the USER presses HOME button again any time while - If the User presses the HOME above is happening, all lights button all four shapes (a,b,c,d) will turn OFF ( assuming thereafter, the actual APP will light up. DJ implementation software will show up - which is beyond our scope) Design the above Sequential circuit using any type of Flip Flops of your choice. a. (15\%) Draw the state diogram b. (15%) Draw the state table c. (10\%) Draw the implementation using os many flip-flops and digital gates as needed