13. Suppose x ~ N(0,1). Let a value K be given. Define by where is, as usual, the indic...

13. Suppose x ~ N(0,1). Let a value K be given. Define by where is, as usual, the indicator function that takes on the value 1 if and is zero otherwise.

(a) Compute symbolically.

(b) What might you imagine is the use of this calculation from an option pricing standpoint?