Is VGI stretching the truth? A 4.9%pa return seems impossible...

Is VGI stretching the truth? A 4.9%pa return seems impossible when the starting price was $2 and the July 31 2021 share price was $2.30. Over the 3.8 years the share price return is closer to 3.7%pa not 4.9%pa. Similarly, NTA started at $2 and was $2.59 3.8 years later which equates to an annual rate of return of about 6.9% not 8.4% net. Although, I do presume "net" means NTA after tax. Could someone with an accounting background please verify these annualised returns and post how you think they arrived at the figures published.

These are just terrible returns no matter how you dress it up......