A study investigated the prevalence of tics in street dogs in a certain population of street dogs. It is said that 60% of street dog population has tics. Tics are identified using a special technique. This technique identifies the dogs as having tics only 80% of the time.

(a) What is the probability that this technique reveals no tics on a randomly selected street dog from this street dog population?

(b) Given that this technique reveals no tics, what is the probability that the randomly selected street sig from this street population has tics?