Consider the following two matrices: -1 4 2 1 A = 2 -1 B 3 1 3 -1 -2 Which of the following four products exist? A², B, АВ, ВА Select one: а. none of the four products exist O b. only B exists B', AB and BA exist, while A² does not exist С. O d. A?, B' and BA exist, while AB does not exist B and BA exist, while A? and AB do not exist е.

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