In the given figure, the numbers associated with the rectangle, triangle, and ellipse are 1, 2, and 3, respectively. Which one among the given options is the most appropriate combination of \( P \), \( Q \), and \( R \)?

The center of a circle $ C $ is at the center of the ellipse $ E: \frac{x^2}{a^2} + \frac{y^2}{b^2} = 1 $, where $ a>b $. Let $ C $ pass through the foci $ F_1 $ and $ F_2 $ of $ E $ such that the circle $ C $ and the ellipse $ E $ intersect at four points. Let $ P $ be one of these four points. If the area of the triangle $ PF_1F_2 $ is 30 and the length of the major axis of $ E $ is 17, then the distance between the foci of $ E $ is:
Consider designing a linear binary classifier \( f(x) = \text{sign}(w^T x + b), x \in \mathbb{R}^2 \) on the following training data: 
Class-2: \( \left\{ \left( \begin{array}{c} 0 \\ 0 \end{array} \right) \right\} \)
Hard-margin support vector machine (SVM) formulation is solved to obtain \( w \) and \( b \). Which of the following options is/are correct?
def f(a, b):
if (a == 0):
return b
if (a % 2 == 1):
return 2 * f((a - 1) / 2, b)
return b + f(a - 1, b)
print(f(15, 10))
The value printed by the code snippet is 160 (Answer in integer).
Create empty stack S
Set x = 0, flag = 0, sum = 0
Push x onto S
while (S is not empty){
if (flag equals 0){
Set x = x + 1
Push x onto S
}
if (x equals 8):
Set flag = 1
if (flag equals 1){
x = Pop(S)
if (x is odd):
Pop(S)
Set sum = sum + x
}
}
Output sum
The value of \( sum \) output by a program executing the above pseudocode is: