Harvard students choose from two lunch options every day: sushi or salad. If a student eats sushi one day, there is a 30% chance that the student will eat salad the next day. Similarly, if a student eats salad one day, there is 30% chance that the student will eat sushi the next day. If the probability of Robert eating sushi two days from now is 45%, what is the probability that Robert eats salad today? and what is the steady-state probability of eating sushi?