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A boy wants to jump from building A to building \( B \). Height of building \( A \) is \( 25 \mathrm{~m} \) and that of building \( B \) is \( 5 \mathrm{~m} \). Distance between buildings is \( 4 \mathrm{~m} \). Assume that the boy jumps horizontally, then calculate minimum velocity with which he has to jump to land safely on building B.
(1) \( 6 \mathrm{~m} / \mathrm{s} \)
(2) \( 8 \mathrm{~m} / \mathrm{s} \)
(3) \( 4 \mathrm{~m} / \mathrm{s} \)
(4) \( 2 \mathrm{~m} / \mathrm{s} \)
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