Explain and anwer all the questions. thanks

2.7 2.8 What is the main purpose of the hardware reset pin on the microcontroller chip? How many bits are needed to access a 4 MB data memory? What is the hexadecimal value of the last address in this memory? 2.9 If the last address of an on-chip memory is 0x7FF, determine its size. 2.14 What does pipelining mean? 4.6 Write a program equivalent to the C language assignment statement z= a + (b* c) + (d *e) - (f/g)-(h* i); Use only: (a) Three-address instructions (b) Two-address instructions 4.11 Find the logic operation and 8-bit data for setting bits 0 and 7 of an 8-bit number, 3A to l's without changing the other bits