Write a C/C manager/worker program to study various strategies for playing the card game called twenty-one. This must be implemented as a multiprocess application. The manager process is the dealer. The worker processes are the players. At least two player processes must be implemented and each must have a unique strategy detailed in the report. Run at least one thousand trials, each with a freshly shuffled deck. Report the number of times the dealer and each player wins. Test your code running it in the Ubuntu LTS environment that you created for Pgm1base.

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Suppose there is a relation r(a, b, c) with a b+-tree index with search keys (a, b).1. what is the worst-case cost of finding records satisfying 10 < a < 50 using this index, in terms of the number of records n1, retrieved and the height h of the tree? 2. what is the worst-case cost of finding records satisfying 10 < a < 50 and 5 < b < 10 using this index, in terms of the number of records n2 that satisfy this selection, as well as n1 and h defined above? 3. under what conditions on n1 and n2, would the index be an efficient way of finding records satisfying the condition from part (2)?

Leo is a recruitment executive for a large company. he has identified new labor resource requirements in both the marketing and production departments. what should be his first step in recruiting candidates for the positions? a. conduct background checks of candidates b. make job offers c. arrange interviews d. conduct reference checks e. place job ads on job sites