Department of Mathematics, Statistics and Computer Science, Dordt College, Sioux Center, IA 51250, USA. ntintle@dordt.edu|Department of Mathematics, Statistics and Computer Science, Dordt College, Sioux Center, IA 51250, USA. ntintle@dordt.edu|Department of Mathematics, Statistics and Computer Science, Dordt College, Sioux Center, IA 51250, USA. ntintle@dordt.edu|Department of Mathematics, Statistics and Computer Science, Dordt College, Sioux Center, IA 51250, USA. ntintle@dordt.edu|Department of Mathematics, Statistics and Computer Science, Dordt College, Sioux Center, IA 51250, USA. ntintle@dordt.edu|Department of Mathematics, Statistics and Computer Science, Dordt College, Sioux Center, IA 51250, USA. ntintle@dordt.edu