In this exercise, we will investigate the use of format specifiers to control the way that output appears on the screen. When printing values of type double, format specifiers have the following form, in general: "s.X.Ylf" with a+ or - sign optionally appearing before the X. Y represents a positive integer that controls the number of decimal places that are displayed. If Y is not specified, the default number of decimal places is 6 . So, "\%lf" indicates that the number is to be printed to 6 decimal places. X represents a positive integer that controls the minimum width of the field in which the number is to be displayed. If X is not specified, the number is displayed in a field just wide enough to print the number to the specified (or default) number of decimal places. So, "8 f " indicates that the number is to be printed in a field of width 8 characters. Note that the number is aligned on the right-hand side of the field, by default, and spaces are added to the left, if required, to fill the minimum width. If there's a - sign in front of the x, the number is aligned on the left-hand side of the field in which it is printed-in other words, spaces are added to the right of the number. If there's a + sign in front of the x, the sign of the number is always printed. So, if the number is positive, a+ sign will be printed immediately preceding the number. Suppose the following variable declarations have been made: double a=2.6680000992176423; Determine the output from each of the following printf statements. The first two are done for you make sure you understand them before you move on. Note that the correct number of spaces (before, after and in the middle) is required for your answer to be considered correct. Don't forget to round the numbers as appropriate