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If $$\vec{A} = 5\hat{i} - 3\hat{j}$$ and $$\vec{B} = 12\hat{i} + 7\hat{j}$$, what is $$\vec{A} + \vec{B}$$?
• $$2\hat{i} + 4\hat{j}$$
• $$17\hat{i} + 20\hat{j}$$
• $$12\hat{i} + 9\hat{j}$$
• $$17\hat{i} + 4\hat{j}$$