Can someone help me break down this question about conditional probability?

It is estimated that 29% of all adults in the United States invest in stocks and that 86% of U.S. adults have investments in fixed income instruments (savings accounts, bonds, etc.). It is also estimated that 26% of U.S. adults have investments in both stocks and fixed income instruments. Answer the questions below. (If necessary, consult a list of formulas. ) (a) What is the probability that a randomly chosen U.S. adult invests in stocks, given that s/he invests in fixed income instruments? Round your answer to X 5 ? 2 decimal places. (b) What is the probability that a randomly chosen stock investor also invests in fixed income instruments? Round your answer to 2 decimal places