Let \( P \) be a point on the ellipse \( \frac{x^{2}}{a^{2}}+\frac{...

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Let \( P \) be a point on the ellipse \( \frac{x^{2}}{a^{2}}+\frac{y^{2}}{b^{2}}=1(ab) \) in
P
W. the first or second quadrants whose foci are \( S_{1} \) and \( S_{2} \). Then the least possible value of the circumradius of \( \triangle P S_{1} S_{2} \) will be:
(1) \( a e \)
(2) be
(3) \( a e / b \)
(4) \( a e^{2} / b \)
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