Original question:

The instructor gave explicit step-by-step instructions on what she wanted.

Step 1:

My [correct] solution to step 1:

Step 2:

My [correct] solution to step 2:

Step 3:

My [correct] solution to step 3:

Step 4 (this is where the problems begin):

My solution to step 4 (now, this is a valid method to solve the problem BUT is NOT how she wants it to be solved!):

Step 5

My solution to step 5 (again, I get the CORRECT answer; but my process, according to my instructor is incorrect based on the given instructions):

_______________

If someone can please assist me in coming up with two nonlinear equations in the 2 variable t1 and K (step 4), I would forever appreciate you!

Thank you very much.