its for digital design

plz plz fast

a- What is meant by a digital system? Use diagrams to illustrate how the information "OMER" input via keyboard, stored in the digital system registers and transferred finally to the memory registers b- What is meant by storage elements (ie., flip-flops)? Justify why they are used in digital systems (provide example) C-What is meant by the dual and complement of DeMorgan's theorem? Justify its application (provide example)