Question: Minimization of a function

Can anyone helps me with my optimization Problem.  Following are the issues :-

  • I have to minimize the function TRC, i am unable to do. 
  • I am unable to add a constraint with if statement. 
  • Check whether i have represented I1 and I2 with respect to alpha and beta right or wrong

Attaching the sheet below, the background marked in yellow is the problem area. Thankyou

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