Note: For this exercise, you may use the provided scratch paper to perform calculations. Please write your name and G# on the top of the page and return to the proctor when you have completed the exam.   Galactica 3000, is a galaxy simulator developed by the (fictitious) computational astrophysics institute at GMU. It is used to model the evolution of galaxies. A simulation consists of two main parts: Gravitational calculations (80% of the runtime): These are parallelizable and can be sped up by adding more processors. Black hole collision predictions (20% of the runtime): Due to the complexity of interactions, this part is not parallelizable. The institute is considering purchasing a new supercomputer with 16 processors to speed up the simulation. The director asks you to evaluate the expected speedup of Galactica 3000 when run on this new hardware. Question 1: Using Amdahl’s law, calculate the theoretical speedup of the simulation on the 16-processor supercomputer. Question 2: Suppose the engineers manage to improve the code so that 95% of the runtime becomes parallelizable. Recalculate the theoretical speedup for this improved version. Question 3: The director wants the simulation to run 10× faster than the current version. Is it possible with the 16-processor supercomputer? If not, how much of the program must be parallelizable to achieve this goal?

Which of the following goods are likely to have many substitutes?

The United States is consistently a net [1] of agricultural goods. The U.S. is a net [2] of goods overall. 

Provide two specific ways prenatal care impacts maternal and child health. 

Which of the following are not considered to be part of the “farm problem” in the economy?

How does education impact health outcomes?

Which two factors are impacted by climate change? 

Which of the following is NOT a principle of the HACCP system?

Which of the following is a common treatment approach for mental illness?

Which of the following is an example of a downstream intervention in public health?