For a given data group, simple exponential smoothing is being used to forecast demand. The forecast of a given period is 110, which turned out to be 4 units more than actual demand. The forecast for next period is 109.2. Based on information given, what is smoothing constant, alpha? Select one:

a. 0.20
b. 0.10
c. 0.15
d. None of the choices
e. 0.60

Consider a bag that contains 220 coins of which 6 are rare indian pennies. for the given pair of events a and b, complete parts (a) and (b) below. a: when one of the 220 coins is randomly selected, it is one of the 6 indian pennies. b: when another one of the 220 coins is randomly selected (with replacement), it is also one of the 6 indian pennies. a. determine whether events a and b are independent or dependent. b. find p(a and b), the probability that events a and b both occur.