Considering ONLY Lean management improvement, select all correct combinations. 

Locations:

1. Welding section 

2. Assembly section 

3. Drilling section

4. Inspection section 

5. Pressing section 

6. Packing section

Statements:

1. Has 83.3% process efficiency

2. Is the primary bottleneck and has lowest efficiency

3. Has the highest opportunity for lean production

4. Performs better than Metal Sheet Cutting

5. Is the second worst performing section