a$)$ and identify the major components $($you can use your own umbrella to get a closer look at the joints

b$)$ idealize the components as one of the list that we discussed $($give reasons: Hint, start with what would be considered as "immovable ground", and start from there$)$

c$)$ Estimate the external load on the umbrella $($think about natural, design and accidental loads$/$overloads$)$