Answer the following questions about Patterson and Hennessy, Chapter 4 and the register renaming web pages. You only need to turn in those that have a point count assigned.

1. (1 point) Briefly describe the three kinds of data hazards.
2. (2 points) Complete the following register renaming table.

   Instruction	$f2	$f4	$f6	$f8	Renamed Instruction
   initial values	V0	V1	V2	V3
   mul.d $f4, $f6, $f2
   sub.d $f6, $f2, $f6
   div.d $f6, $f4, $f2
   add.d $f2, $f2, $f4

3. (1 point) Describe the life-cycle of an instruction in the register renaming architecture.
4. (1 point) What is superscalar execution?
5. (1 point) What is speculative execution?