Let's break down each part of the problem:

Part (a): New Value of the Portfolio

1. Initial Allocation in Each Stock:

   • GoldFinger: 64% of $200,000 = $0.64 \times 200,000 = 128,000$
   • Moosehead: 18% of $200,000 = $0.18 \times 200,000 = 36,000$
   • Venture Associates: Remaining 18% of $200,000 = $0.18 \times 200,000 = 36,000$

2. Initial Shares Purchased:

   • GoldFinger Shares: $\frac{128,000}{22} \approx 5818.18$ shares
   • Moosehead Shares: $\frac{36,000}{91} \approx 395.60$ shares
   • Venture Associates Shares: $\frac{36,000}{9} = 4000$ shares

3. New Value Calculation with Updated Prices:

   • GoldFinger Value: $5818.18 \times 37 \approx 215,272.66$
   • Moosehead Value: $395.60 \times 68 \approx 26,900.80$
   • Venture Associates Value: $4000 \times 11 = 44,000$

4. Total New Portfolio Value: $215,272.66 + 26,900.80 + 44,000 = 286,173.46$

Part (b): Portfolio Return

1. Portfolio Return Calculation: $\text{Return} = \frac{\text{New Portfolio Value} - \text{Initial Portfolio Value}}{\text{Initial Portfolio Value}}$ $= \frac{286,173.46 - 200,000}{200,000} = \frac{86,173.46}{200,000} \approx 0.4309 \text{ or } 43.09\%$

Part (c): New Portfolio We