1. [30 points] A computer is designed to use a 4-stage pipeline, and each stage needs 2 nsec to complete its job. 1) [10 points] How much time does it take for the computer to complete the execution of one instruction? 2) [10 points] What MIPS can this computer reach? 3) [10 points] If the designer decides to merge 3 and 4 into a stage, and this nevw stage takes 4 nsecs to work on each instruction. Therefore this new computer pipeline now has three stages, and the time each stage needs to complete its job is 2ns, 2ns, and 4ns. the a. [3 points] How many instructions can be concurrently executed by this computer? b. [7 points] What MIPS can now this computer reach