The daily exchange rates for the five-year period 2003 to 2008 between currency A and currency B are well modeled by a normal distribution with mean 1.886 in currency A (to currency B) and standard deviation 0.038 in currency A. Given this model, and using the 68-95-99.7 rule to approximate the probabilities rather than using technology to find the values more precisely, complete parts (a) through (d). a) What is the probability that on a randomly selected day during this period, a unit of currency swas worth more than 1.886 units of currency A? The probability is %. (Type an integer or a decimal.) b) What is the probability that on a randomly selected day during this period, a unit of currency was worth less than 1.810 units of currency A? The probability is %. (Type an integer or a decimal.) c) What is the probability that on a randomly selected day during this period, a unit of currency B was worth more than 1.924 units of currency A? The probability is %. (Type an integer or a decimal.) d) Which would be more unusual, a day on which a unit of currency B was worth less than 1.812 units of currency A or more than 1.935 units of currency A? O Less than 1.812 is more unusual. More than 1.935 is more unusual.