A coin of diameter d is tossed at random on a grid of squares of side s. Making appropriate assumptions, to be stated clearly, calculate: a) the probability that the coin lands inside some square (i. e., not touching any line); 390 Chapter 5. Continuous Joint Distributions b) the probability that the coin lands heads inside some square. Suppose now that the coin is tossed four times. Let X be the number of times it lands inside a square, Y the number of heads. Assume d