From the Children’s Catechism:
Q. 69. Why do you need Christ as a prophet?
A. Because I am ignorant.Q. 70. Why do you need Christ as a priest?
A. Because I am guilty.Q. 71. Why do you need Christ as a king?
A. Because I am weak and helpless.
From Daily Confession, a blog which posts daily sequential harmonised excerpts from the reformed confessions and catechisms.