please use excel solver

o Arial 10 B 7 V 5A =#N/A B D E F G H J K Model 3 Number to - Make - Buy Slip Ring Model 1 0 0 Model 2 0 0 ojo Step 1: assign set cell as $e$11 Step 2: assign variable cells as $b$6:$d$7 Step 3: assign non negativity constraint $b$6:$0$7>=0 Step 4: assign constraints $e$17:$e$18