1. Some of Jane Collier's novels are interesting. The only novel Jane Collier wrote is The Cry. Therefore, The Cry is interesting. (Nx: x is a novel; Wxy: x wrote y; Ix: x is interesting; j: Jane Collier; c: The Cry)

2. Ronald Reagan was the oldest U.S. president. Woodrow Wilson was a U.S. president. Woodrow Wilson is not Ronald Reagan. Therefore, Ronald Reagan was older than Woodrow Wilson. (Ux: x is a U.S. president; Oxy: x is older than y; r: Ronald Reagan; w: Woodrow Wilson)

3. The artist who painted the Mona Lisa was a Florentine. Leonardo is the artist who painted the Mona Lisa. Therefore, Leonardo was a Florentine. (Ax: x is an artist; Pxy: x painted y; Fx: x was a Florentine; m: the Mona Lisa; l: Leonardo)

4. The novel on the table was written by Margaret Mitchell. The only novel Margaret Mitchell wrote is Gone with the Wind. Therefore, the novel on the table is Gone with the Wind. (Nx: x is a novel; Tx: x is on the table; Wxy: x wrote y; m: Margaret Mitchell; g: Gone with the Wind )

5. The author of King Lear was an English actor. John Milton was English but not an actor. Therefore, John Milton is not the author of King Lear. (Wxy: x wrote y; Ex: x is English; Ax: x is an actor; k: King Lear; m: John Milton)

Derive the conclusion of the following arguments. Use conditional proof or indirect proof as needed.