During her beginning mechanics course, Rose learned that her leaking radiator holds 16 quarts of water. She temorarily patched the leak when the radiator was partially full. At that time it was 50% antifreeze. After she filled the remaining space in the radiator with an 80% antifreeze solutionand waited a little while, she found that it was 65% antifreeze. How many quarts of solution were in the radiator just before Rose added antifreeze? how many quarts of 80% antifreeze solution did she add?

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