Question

Need number3 and 4, what does that mean to trace the descent, what should I write

Answer 1

4. Andrew of Greece, Louis of Battenberg, and Ludwig IV of Hesse.

3. Elizabeth Bowes-Lyon, Mary of Teck, and Alexandra of Denmark.

Answer 2

for number 3, Queen Victoria's children and Queen Elizabeth II's descendants are Edward VII, George V, George VI
for number 4, the descendants of Philip of Greece are Alice, Victoria of Hesse, Alice of battenburg