In order to obtain a single$-$slit diffraction pattern with a central maximum and several secondary maxima, the slit width could be

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$102102$

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$2$$2$

$10$

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Find the sailor ID$$ and$$ names of sailors who have reserved both a red boat or a green boat

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Find the Sailor ID$$ names of sailors who have reserved both a red boat and a green boat.

Find the Sailor ID$$and names of all sailors who have reserved red boats but not green boats.

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