Answer:
Let's presume $100 to be a hypothetical investment.
The final amount of the investment will be equivalent to I [ 1-front-end load ] [ 1 + r-true expense ratio]T Loaded-Up: the 12b-1 operating expense charge will be added to the actual expense ratio: expense ratio + (12b-1 fee) = 1% + 0.75% = 1.75%.
Therefore with that in mind.
a. Year 1 = $100 (1 + 0.06 - 0.0175) = $104.25 b. Year 3 = $100 (1 + 0.06 - 0.0175)3 = $113.30 c. Year 10 = $100 (1 + 0.06 - 0.0175)10 = $151.62
Economy fund:
a. Year 1 = $100 0.98 (1 + 0.06 - 0.0025) = $103.64 b. Year 3 = $100 0.98 (1 + 0.06 - 0.0025)3 = $115.90 c. Year 10 = $100 0.98 (1 + 0.06 - 0.0025)10 = $171.41