Please help me with the following

The daily exchange rates for the fiveyear period 2003 to 2003 between currencyA and currency B are well modeled by a normal distribution with mean 1.?42 in currency A (to currency B) and standard deviation 0.022 in currency A. Given this model, and using the 639599? mle to approximate the probabilities rather than using technology to nd 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 B was worth more than 1.?42 units of currency A? The probability is Drip. (Type an integer or a decimal.) b] What is the probability that on a randomly selected day during this period, a unit of currency B was worth less than 1.6?5 units of currency A? The probability is Drip. (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 less than 1.893 units of currency A? The probability is Drip. (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 1.536 units of currency A or more than 1.?69 units of currency A? C) More than 1.?59 is more unusual. 0 Less than 1.585 is more unusual