Question: 5. If three random variables have the joint density k(r+y)e_z, for 0 HI} 1;, z] 2 {0, elsewhere nd {a} the value of k; {b}

5. If three random variables have the joint density k(r+y)e_z, for0 HI} 1;, z] 2 {0, elsewhere nd {a} the value of k; {b} the probability that X c: Y and Z > 1. 6. With reference to the preceding exercise, check whether {a} the three random variables are independent; (13} any two of the three random variables are pairwise independent

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