Please all the questions: 1- What's the difference between Program Visible and Invisible? Explain. 2- When is RIP an IP or EIP? 3. What's STD in 8086? 4- How much is the code segment in 80386? 5. Whenthe segment address is FFFFH and the offset address is 4000H, what are the machine addresses memory location? 6- In 80286 access rights descriptor, what C=1 means? 7- In 80286 protected mode segment register, TI=1 stands for what? 8- What is the usage of AV bit in 80386 descriptor? 9. Explain: Base=Start = 10000000H G=0 End =Base + Limit = 10000000H + 001FFH = 100001 FFH