4 u225) can be expressed as an extemal direct product of a) z, z, z, z; z b)zis z5 () z,z z z d) z, z ifb={1. 12. 13} is an orthogonal set of vectors with respe

4 U225) can be expressed as an extemal direct product of a) Z, Z, Z, Z; Z b)Zis Z5 () Z,Z Z Z d) Z, z IfB={1. 12. 13} Is an orthogonal set of vectors with respect to an inner pro duct on a vector space V, then the set B (a) is linearly independent 5. b) is linearly dependent C)is an orthonornmal basis for dspans the vector space