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4. Julia wants to determine the height of a flagpole shown in the diagram. She uses a survey instrument to measure the angle of elevation to the top of the flagpole, and determines it to be \( 34.9 \) degrees. She walks \( 8 \) meters and determines the angle of elevation to be \( 52.8 \) degrees. At each measurement, the survey instrument is \( 1.7 \) meters above ground. Determine and state, to the nearest tenth of a meter, the height of the flagpole.