There are acts in a talent show. A comedian, a dancer, a guitarist, a magician, a pianist, a singer, a violinist, and a whistler. A talent show host randomly schedules the acts. Compute the probability of each of the following events. Event A: The first four acts are the pianist, the magician, the whistler, and the dancer, in any order. Event B: The violinist is first, the magician is second, the dancer is third, and the pianist is fourth.