Last call please help me A student does an experiment to estimate the density of an irregularly shaped stone. Which items of equipment are needed

a)a balance and a measuring cylinder containing water
b)a balance and a ruler
c)a ruler and a measuring cylinder containing water
d)only a measuring cylinder containing water

Against his financial advisor's advice, frank has decided to invest his money in some risky stocks because he once made quite a bit of money in the stock market. his decision illustrates a. the representativeness heuristic b. overconfidence c. the availability heuristic d. confirmation bias select the best answer from the choices provided