Sketch:

Download a copy of the figure to your own computer by clicking this link and saving the image from your browser. Please follow these directions:

Open the image file in any program you like. You MUST be able to place text and lines over this image. You could use a word processor, a "paint" program or powerpoint for example. BUT you must be able to save the result, which will have name and annotation lines on top of the figure.

Use a different colour to draw lines for your interpretations of age ranges for specimens in the figure. Note: On the left hand side of the sketch, you should include the entire possible range for sp$.3,4,6$ and $7$ based exclusively on when the animal group was extant $($in other words the ranges you show should not be shortened to account for the geological constraints imposed by the section$).$