b) Let YQ,Y2, ..., Y, denote a random sample from N(0,0) distribution with probability density function: f(y;0) 1 V2πθ (

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b) Let YQ,Y2, ..., Y, denote a random sample from N(0,0) distribution with probability density function: f(y;0) 1 V2πθ (5) 1) Show that f(y; 8) belongs to the 1-parameter exponential family. ii) What is the complete sufficient statistic for e? Justify your answer. (2) iii) Show whether or not, the maximum likelihood estimator is an unbiased estimator of . (6) iv) Does the estimator attains the minimum variance unbiased estimator of 8. (6)