Probability - Waiting-Time and Stopping-Rule Probabilities

A bag contains \(10\) orange-flavoured, \(14\) strawberry-flavoured, and \(16\) cherry-flavoured sweets which are of identical shapes and sizes. Benny selects a sweet at random from the bag. If it is not cherry-flavoured he replaces it and selects another sweet at random. He repeats the process until he obtains a cherry-flavoured sweet.

Calculate the probability that

1. the first sweet selected is strawberry-flavoured and the fourth sweet is orange-flavoured,
2. he selects an even number of sweets.