Probability of combined events — practice question

A box holds 10 counters, and each counter is either red or green. The ratio of red counters : green counters is $1 : 4$. Shareen selects one counter at random, records its colour and replaces it in the box. She then selects a second counter at random. A tree diagram is provided with branches headed First counter and Second counter, and outcomes Red and Green, but the probabilities are blank.