Question

The related programs Abel and Mabel are used to simulate these physical objects, and include methods from the microSIRIL library. The Steinhaus-Johnson-Trotter algorithm, which was described in the 1960s, is actually equivalent to a technique used with these objects since the 17th century. Fabian Stedman wrote two books that popularized algorithms like Grandsire and Plain Bob used with these objects. Going through all permutations of these objects is called an “extent”, which can take a couple hours with 7 of them. Adjacent (15[1])examples of these objects have their order swapped in sequences called “changes”, where a sequence of at least 5000 changes is called a (*) “peal”. (10[1])In the “full circle” technique, these objects start facing up and are swung through a large arc by pulling a long rope straight down. For 10 points, name these (-5[1])objects studied in campanology. ■END■ (10[1]0[1])

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