The graph the method of solution should look familiar. It is your other question but with different numbers.
A) y' = -0.5*(2e^(-0.5x)) = -e^(-0.5x)
.. Gradients and tangent points are in the table with the graph.
B) Same answer as previously. The second graph is provided for your enjoyment in doing this step.
https://brainly.com/question/9338291