Ciara has been adding funds to his investment account each year for the past 3 years. She started with an initial investment of $1,000. After earning a 10 percent return the first year, she added $3,000 to his portfolio, but her investments lost 5 percent. Undeterred, Ciara added $2,000 the next year and earned a 2 percent return. Last year, discouraged by the recent results, she only added $500 to her portfolio, but in this final year her investments earned 8 percent. What was Ciara's dollar-weighted average return for her investments