how to answer the following questions The number of recursive calls that a method goes through before returning is called:  A. order of growth efficiency.  B. the depth of recursion. C. combinatorial recursive count. D. activation stack frame.   The following code is supposed to return the sum of the numbers between 1 and n inclusive, for positive n. An analysis of the code using the "Three Question" approach reveals that: int sum(int n){   if (n == 1)     return 1;   else     return (n + sum(n)); } A. it fails the base-case question.  B. it fails the smaller-caller question. C. it fails the general-case question. D. it passes on all three questions and is a valid algorithm.   If we cannot remove recursion because tail recursion does not exist, we can always remove it by using:  A. statically allocated activation records  B. a dynamic programming approach.  C. our own explicitly declared stack.  D. a carefully constructed loop

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Computational Systems

The computation systems can be defined as the systems that are capable of solving a problem that includes calculations either mathematical or logical, and are able to produce the result as an output. For example, a simple calculator that is given a set of numbers and operators as input and produces the result as an output can be defined as a computational system. The above example is a simple illustration only, the computational systems range from simple devices to complex devices such as the systems that control the SpaceX companies, Starlink satellites which are being quite recently seen in the skies at many places globally.