Consider a disk that is scheduled as follows: the disk head moves from the first cylinder to the last cylinder repeatedly, processing the I/O requests in various cylinders along the way. That is, after it reaches the last cylinder, it first moves back to the first cylinder, without processing any requests and then resumes processing of requests as it scans from the first cylinder. At time t, let the disk have the following requests in its queue: Request Cylinder R1 25 R2 12 R3 47 R4 32 R5 74 R6 63 R7 17 R8 91 Let the most recent I/O request processed by the disk be in cylinder 40 (i. e., the disk is scanning from cylinder 40 towards the higher-numbered cylinders at time t). Also, assume that no other requests arrive in the disk queue until all of the above requests are processed. Determine the schedule of processing for the above set of requests. Based on the schedule, identify the TRUE statement among the following, with respect to the relative order of processing the various requests.

Write a program that reads in a series of lines of input character by character (using the library function the first line of the input contains an integer which specifies the number of remaining lines of input, each of which contains a floating point number. the integer value on the first line can be read with (the library function) but all of the following lines can only be read with each line, after the first, contains a single floating point value, with up to four digits before the decimal point, and up to four digits following the decimal point, but there is not necessarily a decimal point in each number; i.e., it may appear to be an integer, but the digits should be read by your program, and the number should be converted to a corresponding floating point number. for instance, suppose the following input: 5 3.1255 20.25 0.875 1921.50 31 the required output is: − each of the input floating point values, printed on a separate line with four digits of precision, using printf(); − on the last line of the output, the string “total: ” followed by the sum of the input values, printed with printf() to 4 digits of precision. for example, the total of the sample input given above is 1976.7505, so the required output for this input would be: 3.1255 20.2500 0.8750 1921.5000 31.0000 total: 1976.7505 do not concern yourself with small differences in the total due to rounding, as the grader will not deduct points for this. constraints: − you are not allowed to use arrays on this portion of the lab assignment. − there is no maximum number of lines allowable. it all depends upon the first value of input. since you aren’t saving anything, it doesn’t matter. − you can assume that input will not contain more than 4 digits before or after the decimal point. you do not need to error check for this condition. -you must use getchar() to read in the floating point values one character at a time (i.e. do not use -you must declare and use your floating point values as a double to minimize rounding errors. -only use printf() to output the floating point numbers and the total (do not use − be sure your directions to the user are clear so they are sure to enter the input data correctly.