Suppose the annual employer 401(k) cost per participant is normally distributed with a standard deviation of $625, but the mean is unknown.

(a)If 73.89% of such costs are greater than $1,700, what is the mean annual employer 401(k) cost per participant?

(b)Suppose the mean annual employer 401(k) cost per participant is $2,258 and the standard deviation is $625. If such costs are normally distributed, 31.56% of the costs are greater than what value?

(Round values of z to 2 decimal places, e.g. 0.12.)

(a)=

enter a mean value

(b)x=

enter an appropriate value