If $\overrightarrow A = 4\hat i - 3\hat j$ and $\overrightarrow B = 6\hat i + 8\hat j$,find the magnitude and direction of $\overrightarrow A + \overrightarrow B$.
- A$5, \tan^{-1}(3/4)$
- B$5\sqrt{5}, \tan^{-1}(1/2)$
- C$10, \tan^{-1}(5)$
- D$25, \tan^{-1}(3/4)$
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