Below are five computational tasks. For each one, choose the data structure or abstract data type you feel best suited to the task from the following list: Stack, Queue, Hashtable, AVL Tree, Priority Queue, Union-Find. In addition, list the basic operations for the data structure or ADT that you chose and give asymptotic worst-case running times for those operations. No additional explanation is required.

e) Store the activation records (i.e. objects containing the return address and local variable associated with a function call) for nested function calls.

f) What is log2(1; 000; 000; 000) to the nearest whole number?

g) Your friend says she does not like implementing algorithms that have amortized run-time guarantees because amortization makes it harder to debug her code. Why does this argument make no sense? (A one sentence answer is probably enough.)