Please do the following four questions based on the following techniques to improve performance with additional hardware and/or code. i. Dynamic Scheduling ii. Data Forwarding iii. Loop Unrolling iv. Software Pipelining v. Multithreading Which one(s) require a great number of additional registers? Which ones(s) can support multi-issue processors? Which one requires most static-time preparation? Which one(s) may cause code explosion?