, Department of Programming, Computer and Telecommunication systems, Khmelnytskyi National University, Khmelnytskyi, Ukraine Kamyanets-Podilsky College of Food Industry, National University of Food Technologies, Kamyanets-Podilsky, Ukraine (Ukraine)
, Department of Mathematics, Ambrose Alli University, Ekpoma, 310001, Nigeria (Nigeria)
, Faculty of Mechanics and Mathematics, Ivan Franko National University of Lviv, Lviv, Ukraine (Ukraine)

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