Stocks

Since the stock market began in 1872, stock prices have risen in about 73% of the years. Assuming that market performance is independent from year to year, what's the probability that

a) the market will rise for 3 consecutive years?

b) the market will rise 3 years out of the next 5?

c) the market will fall during at least 1 of the next 5 years?

d) the market will rise during a majority of years over the next decade?