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Solve the all parts of given problem:

Problem: A particle at t1 = -2.0 s is at x1 = 3.4 cm and at t2 = 4.5 s is at x2 = 8.5 cm.

Part A: What is its average velocity?

Part B: What is the speed?

Please help, completely confused!! Give steps if possible for above problem.

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