please show all steps

this is a 3 step question

1. find the diffusion coefficient at 200C for zinc diffusing into copper.

2. draw a plot showing diffusion coefficient vs. temperature for zinc diffusing into copper over the range of 0C to 800 C. Include a minimum of eight data points. Examine and describe What does the shape of the curve tell you about the dependence of diffusion rate on temperature.

3. Determine the diffusion coefficient for nickel diffusing into copper at 200C. Explain why the value differs from that found in part 1.