Why bitcoin has been found to be unsuitable to serve the functions of money (the most crucial factor)? volatility of its price affordability and accessibility rules and regulations decentralized authority to control limited supply Question 18 (2 points) Considering the given information in the table, calculate the expected (1-year) spot rate between USD and AUD (Australian Dollar) under PPP. CPI = Consumer Price Index. Make sure you use the precise calculation, not the approximate one. AUD1.6389. AUD1.5500. AUD1.5723. AUD1.5712. AUD1.5291