11. Decomposing the positive integer 18 into a product of two positive integers gives

$$1 \times 18, 2 \times 9, 3 \times 6$$

three ways. Among these three decompositions, $3 \times 6$ has the smallest difference between the two numbers, so we call $3 \times 6$ the optimal decomposition of 18. When $p \times q ( p \leq q )$ is the optimal decomposition of a positive integer $n$, we define the function $F ( n ) = \frac { p } { q }$. For example, $F ( 18 ) = \frac { 3 } { 6 } = \frac { 1 } { 2 }$. Which of the following statements about the function $F ( n )$ are correct?\\
(1) $F ( 4 ) = 1$.\\
(2) $F ( 24 ) = \frac { 3 } { 8 }$.\\
(3) $F ( 27 ) = \frac { 1 } { 3 }$.\\
(4) If $n$ is a prime number, then $F ( n ) = \frac { 1 } { n }$.\\
(5) If $n$ is a perfect square, then $F ( n ) = 1$.

\section*{Part Two: Fill-in-the-Blank Questions (45 points)}
Instructions: 1. For questions A through I, mark your answers on the "Answer Section" of the answer sheet at the indicated row numbers (12–32).\\
2. Each completely correct answer is worth 5 points. Wrong answers are not penalized. Incomplete answers receive no points.

A. A sample survey of 1000 families with two children in a certain region obtained the following data, where (boy, girl) represents a family where the first child is a boy and the second child is a girl, and so on.

\begin{center}
\begin{tabular}{ | c | c | }
\hline
Family Type & Number of Families \\
\hline
(boy, boy) & 261 \\
\hline
(boy, girl) & 249 \\
\hline
(girl, boy) & 255 \\
\hline
(girl, girl) & 235 \\
\hline
\end{tabular}
\end{center}

From this data, the estimated ratio of boys to girls in families with two children in this region is approximately\\
(rounded to the nearest integer).

B