Since we Wendi worked a combined 28 hours Monday through Thursday (7 Hr/Day x 4 Days = 28 Cumulative Hours), we can subtract the 28 hours from the weekly sum of 32 hours, and conclude that on the final day, Wendi worked 4 hours (32 Total Hours - 28 Cumulative Hours = 4 Hours Remaining).
Final Answer: "On Friday, Wendi worked 4 hours."
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