B. B2 and &. , BD, 4874234567487BFB9D/548725CB54874D74875E2BDC87 25CB5487 82 38B2 6

!. 9a8dab2b268, B2!2C

!. and !. C. B2, BD929282CA8A!D2C89B9B24B29B796BDA8A26962B2UB-2!92B2!D2899, pp.6-8