Consider a mid-test loop, here written in C, that looks for blank lines in its input: for (;;) { line = read_line(); if (all_blanks(line)) break; consume_line(line); Show how you might accomplish the same task using a while or do (repeat) loop, if mid-test loops were not available. (Hint: One alternative duplicates part of the code; another introduces a Boolean flag variable.) How do these alternatives compare to the mid-test version