Exercise 2. Let f (at) = 6A9: be the ow prot from an investment opportunity and assume that A 0 assuming that the stochastic process act is subject to the following barriers: (1) an upper absorbing barrier at b > 330; (Once b is reached, assume that it stays there forever and there is a constant prot ow of f (b) thereafter.) (2) a lower absorbing barrier at a 230; (4) a lower reecting barrier at b > :60; (5) both an upper absorbing barrier at b > $0 and a lower reecting barrier at a 0