Who killed Megan fielding in the fake murder mystery case

Hye-seung is giving a speech on turtles, specifically on the need to protect the turtle population in the pacific ocean due to rising ocean temperatures. the general purpose of her speech is likely:

How and why did the 27th amendment modify the authority of congress to set its own pay

In which type of economy are these decisions made by the producers , consumers, and the goverment?