The Southside Bowling Alley has collected data on the number of children that come to birthday parties held at the bowling alley. Let the random variable X = the number of children per party. The distribution for the random variable X is given below. P{X=k) O. 15 ? 0.1 0. 25 a) The probability that at least 7 children will come to a party is b) The expected number of children that will attend this party is E(X)= . Write answer to two decimal places. c) If the standard deviation for the number of children per party is 1.72, then the variance will be . Write answer to two decimal places. d) The probability that six or eight children will come to a party is