Can someone explain this to me PLEASE! I tried to run the numbers and confused myself more! Thanks!

Dow Jones Industrial Average.xlsx has the annual returns of the index from 1993 to 2022 . What is the probability that the return is positive? P(ReturnDow0)=#ofReturns#ofReturns0? 63%68%73%78% Continuing from the previous question, what is the probability that the return in year t is positive if the return in year t1 is positive? P(Rt0Rt10)=#RtwithRt10#ofRt0withRt10? 83%68%73% 78% Continuing from the previous question, what is the probability that the return in year t is positive if the return in year t1 is negative? P(Rt0Rt1