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Question 6 Not yet answered Marked out of 2.00 Flag question 1. Let X be an inner product space. Using the parallelogram identity to prove by few lines the Appolonius' identity: \lz – x]]2+||z – y112 = } }\x – yll+2||2 – } (x + y)|| 2. Prove that the norm function f(x) = ||x:X + Ron a vector space X is continuous.