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A mass m is attached to a spring of force constant 80.0 N/m and allowed to oscillate. The figure (Figure 1) shows a graph of its velocity V as a function of time t. Figure vx(cm/s) 10 -10 -20L प्रর 0.2 0.6 1.0 1.4 1.8 < 1 of 1 > Part D At what times does the mass reach the position = +A in the interval between t = 0s and t = 1.8 s including the endpoints? Express your answer in seconds to three significant figures. If there is more than one value, please enter your answers in ascending order separated with commas. [-] ΑΣΦ t = 0.4s, 1.2s, 2.0s Your submission doesn't have the correct number of answers. Answers should be separated with a comma. No credit lost. Try again. Submit Part E Submit Previous Answers Request Answer Find the maximum acceleration of the mass. Express your answer in cm/s² to three significant figures. amax= 78.5 cm/s² Part F ? Previous Answers S ✓ Correct Correct answer is shown. Your answer 78.77 cm/s² was either rounded differently or used a different number of significant figures than required for this part. Find the times at which the maximum acceleration occurs in the interval between t = 0s and t = 1.8 s including the endpoints. Express your answer in seconds to three significant figures. If there is more than one value, please enter your answers in ascending order separated with commas.