The measured total execution time of using different number of th Figure 1. threads is shown in DAXPY OpenMP on Multi-core Computer number of threads Figue 1 Execution time vs number of threads 1. Based on the information provided, write your answers to the following questions: (a) What are the measured execution time per vector element when one thread and four threads are used, respectively? (b) What is the maximum performance speed up by using multi-threading? 2. Assume two threads are used in the OpenMP implementation, and CPU is operating at the base frequency on the normal mode (not in the turbo boost mode). Use the CPU spec. information in Table 1 to answer the following questions: (a) What is the cycles per arithmetic operation (CPop)? (Hint: you need to figure out how many arithmetic operations in DAXPY)