The red 2, the yellow 1, and the green 1 are played on the stacks.
Bob's hand is, from newest to oldest: blue 1, blue 2, green 1, yellow 4
Cathy's hand is, from newest to oldest: green 2, purple 1, purple 2, yellow 2 (clued with 2)
Alice clues 3 to Donald, touching a 3 on slot 2.
What notes should Donald write on his card? Be specific.
It can be a red 3 as a "normal" Play Clue.
It can be a yellow 3 as a Prompt on Cathy's yellow 2.
It can be a green 3, as a Hidden Finesse on Cathy's green 2. (The yellow 2 will play first as green 2.)
It can be a blue 3, as a Double Finesse on Bob's blue 1 and blue 2.
It can be a purple 3, as a Clandestine Finesse on all of Cathy's cards. (This is technically called a Surreptitious Finesse, but you do not have to worry about the distinction at level 5.)
Donald should write a note that includes all of these possibilities: r3, y3 if y2 p, g3 if g2 f, b3 if b1 f, p3 if p1 f