9. In Fig. 9, ε=100V, R1=10Ω, R2=20Ω, R3=30Ω, and L=2H. Immediately after switch S is closed, what are (a) i₁ and (b) i₂? A long time later, what are (c) i₁ and (d) i₂? The switch S is then reopened. Just then, what are (e) i₁ and (f) i₂? A long time later, what are (g) i₁ and (h) i₂? (16%)

(4) NTPU Corp is committed to its quality program. It works with all areas of the company to establish sound quality programs within reasonable budget guidelines. For 2026, it has budgeted $1,000,000 for prevention costs and $900,000 for appraisal costs. Internal failure has a budget of $100 per failed item, while external failure has a total budget of $600,000. Product Testing has proposed to management a change in the 2026 budget for a new method of testing products. If management decides to implement the new method, $1.5 per unit of appraisal costs will be saved, up to a level of 150,000 tests. No additional savings are expected past the 150,000 level. The new method involves $95,000 in training costs and $65,000 in yearly testing supplies. Traditionally, 5% of all completed items have to be reworked. External failure costs average $120 per failed unit. The company's average external failures are 1% of units sold. The company carries no ending inventories. Required: How much do internal failure costs change, assuming 500,000 units are tested under the new method and it reduces the amount of unacceptable units in the manufacturing process by 40%?

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