Write a function named average_value_in_file that accepts a file name as a parameter and reads that file, assumed to be full of numbers, and returns the average (mean) of the numbers in that file. The parameter, filename, gives the name of a file that contains a list of numbers, one per line. You may assume that the file exists and follows the proper format. For example, if a file named input. txt contains the following numbers

It took 1.75 sec to get to the batter

Well, this code would box the whole body of an html document. by using the relative value for position, you are telling it to position relative to its normal position, which the top left corner is at (0,0). by using left: 50px, you are telling the box to set the left margin  edge to 50px and by using top: 50px, you are telling it to set the top margin edge to 50px. by doing this shifting, the top left corner of the box, which is at (0,0) would be positioned at (50,50)