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Solve each part of following question given below:

Question: At 3:00 pm, a bank robber is spotted driving north on I-15 at milepost 130. His speed is 114 mi/h. At 3:39 pm he is spotted at milepost 186 doing 105 mi/h.

Part A: During this time interval, what is the bank robber's displacement? (Assume a straight highway for all calculations).

Part B: What is his average velocity?

Part C: What is his average acceleration?

I don't know how to get that answer. Please help.

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