Question: Hi, can someone help me with this please. Let E1, 11'; be orthonormal vectors in R2. Please justify your answers to all questions. (a) (4
Hi, can someone help me with this please.

Let "E1, 11'; be orthonormal vectors in R2. Please justify your answers to all questions. (a) (4 points] What is the length of 411'] + 17;? (b) (4 points] What is the angle between 4131 + {2 and 3171 + 5113'? (c) (4 points] What is the area of the parallelogram with sides 42171 + 2172 and 311'] + 5112
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