Paragraph: Read the following passage and answer the questions. Let...

Paragraph: Read the following passage and answer the questions. Let $A B C D$ be a square of side length 2 units. $C_2$ is the circle through vertices $A, B, C, D$ and $C_1$ is the circle touching all the sides of square $A B C D$. $L$ is the line through $A$.Question: If $P$ is a point on $C_1$ and $Q$ is a point on $C_2$, then $\frac{P A^2+P B^2+P C^2+P D^2}{Q A^2+Q B^2+Q C^2+Q D^2}$ is equal to