Average velocity and instantaneous velocity

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lina2selena
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Homework Statement
I'm not sure if my answers are correct
Relevant Equations
everything is down below
Slide with homework problem 8 text on the left and a position-time graph on the right, x(m) against t(s), with the curve rising to 4 m at 1 s, falling to -2 m near 2.5 s, flat until 4 s, then rising to 0 at 5 s.
Photo of handwritten notes showing average velocity calculations for parts (a) through (d), with formulas such as v_avg = Δx/Δt and numerical results written in red-underlined handwriting, plus a small x-t graph on the right.
 

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