$5.$ The table below gives the price of a stock at the end of each of the last ten years $($assume no dividends$).(4$ points$)$

a$.$ What is the arithmetic average annual return on the stock?

b$.$ What is the geometric average annual return on the stock?

c$.$ What is the annual HPR on the stock?

d$.$ What is your best estimate of the stock return for the year $2009?$

$1999200020012002200320042005200620072008$

$$100$ $$70$ $$70$ $$90$ $$100$ $$125$ $$130$ $$150$ $$130$ $$90$