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# X1 and X2 are two independent Gaussian random variables each with mean zero and unit variance.

X1 and X2 are two independent Gaussian random variables each with mean zero and unitvariance. LetY1 = 2X1 + X2 + 3 (1)Y2 = X1 ô€€€ X2 ô€€€ 1 (2)Find the joint probability density function of Y1 and Y2.