Consider the following search trie, where the values are shown next to the nodes of the corresponding string key 7 (A A 13 4 (A A11 17 (T T12 (a) Circle which one or more of the following strings are keys in the trie CA TC AGA CAA CACA CAT CGA CGCA TA TCA TGT (b) Insert the two strings CGTT and TGA into the trie with the associated values 0 and 99 respectively; update the figure above to reflect the changes