A source emits sound waves of frequency \( 1000 \mathrm{~Hz} \). The source moves to the right w...

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A source emits sound waves of frequency \( 1000 \mathrm{~Hz} \). The source moves to the right with a speed of \( 32 \mathrm{~m} / \mathrm{s} \) relative to ground. On the right a reflecting surface moves towards left with a speed of \( 64 \mathrm{~m} / \mathrm{s} \) relative to the ground. The speed of sound in air is \( 332 \mathrm{~m} / \mathrm{s} \). Find
(a) the wavelength of sound in ahead of the source,
(b) the number of waves arriving per second which meets the reflecting surface,
(c) the speed of reflected waves and
(d) the wavelength of reflected waves.
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