Consider the following information and answer questions based on it.
P, Q, R, S are four friends who pursue teaching, law, banking, cooking and own red, blue, white and yellow house, in a random order. An individual owns only one house and pursues only one profession.
1. P owns a red house and is not a banker.
2. The owner of blue house is a lawyer.
3. The colour of S's house is neither yellow nor white.
4. R is a teacher.