Practice Rules 1-3: Add the needed commas to these sentences. a. If the roundabout were modified by adding a right-turn bypass lane Alternative 3 would also provide acceptable conditions. b. Native slopes in the property area measure about 3:1 (18) but flatter and steeper areas are present at the property. c. Pile 2 contains a 53% loss of core section from rot and piles 1 and 3 which were not drilled sounded very hollow at specific heights