Obtain estimates of daily relatives for the number of customers at a restaurant for the evening meal, given the following data.

$\backslash$table$[[$Day$,\backslash$table$[[$Number$],[$Served$]],$Day,$\backslash$table$[[$Number$],[$Served$]]],[1,82,15,89],[2,76,16,77],[3,80,17,87],[4,92,18,97],[5,135,19,131],[6,141,20,143],[7,41,21,43],[8,84,22,89],[9,80,23,75],[10,85,24,80],[11,95,25,95],[12,132,26,136],[13,136,27,148],[14,41,28,42],[,,,]]$

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a$.$ Use the centered moving average method. $($Hint: Use a seven$-$day moving average.$)($Round your intermediate calculations and final answers to $4$ decimal places.$)$

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