a. In Blom's key distribution scheme, if a=5,b=7,c=9,p=997 and node U has ru=3. Calculate au and bu. b. In Blom's key distribution scheme, a node U has au=33 and bu=43, node V has rV=6, what is their common key KUV ? c. In Blom's key distribution scheme, two nodes U and V have been captured, it is found that rU=3,au=58,bu=42, and rv=5,av=88,bv=60; calculate the secret parameters a,b and c. d. In a five-member group using Generalized D-H KMD scheme, what is the message that is sent by third member to fourth member? e. In a five-member group using Generalized D-H KMD scheme, what is the message that is sent by third member to second member? f. In a five-member group using B\&D KMD scheme, show calculations by third member for the group key