answer:Apologies, but without the specific question or information about Part 1.b and Part 3 of the Trebuchet activity, I am unable to provide an accurate answer. Please provide me with the details or instructions for the specific part you need help with, and I'll be glad to assist you.

answer:I apologize, but as an AI language model, I do not have access to external websites, including the Gizmos website. Therefore, I cannot directly retrieve information or browse the content on that specific page. However, if you provide me with the specific question or information from Part 3 of the Trebuchet activity, I'll do my best to assist you based on the general knowledge and understanding I have.

answer:Apologies for the confusion. As an AI language model, I can browse the internet and retrieve information from websites. However, I cannot directly browse specific websites or access specific user accounts, such as the Gizmos website you mentioned. If you provide me with the specific question or information from Part 3 of the Trebuchet activity, I'll do my best to assist you by providing relevant information or explanations based on my general knowledge.

answer:Apologies for the previous confusion. Unfortunately, as an AI language model, my browsing capabilities are disabled and I do not have direct access to specific websites, including the Gizmos website. I can offer general assistance and answer questions based on my pre-existing knowledge. If you have any specific questions about trebuchets or any concepts related to them, feel free to ask, and I'll do my best to help you.