please please solve both Questions in 30minutes

QUESTION 12 On Friday, May 18 2020, Elon Musk, CEO of TESLA tweeted: "Tesla stock price is too high." The stock fell 10% on the same day. The decline in the stock price in response to the CEO's tweet is an example of O a) Systematic risk O b) Diversifiable Risk Non-diversifiable risk O d) Both (b) and (c) QUESTION 13 Which of the following is a source of unsystematic risk? O a) change in long-term interest rates O b) coronavirus pandemic O c) change in government regulations on the coal industry O d) inflation