An arithmetic sequence is an ordered set of numbers such that all adjacent elements have the same fixed difference between them. In fact, each element of an arithmetic sequence is determined as follows an = a1 + d(n 1) where a1 is the value of the first element of the sequence, d is the step size and n is the position of the element in the sequence. For instance, if a1 = 5 and d = 2, the tenth element of the sequence, a10, will be a10 = 5 + 2(10 1) = 23. Given the above information, write a COMPLETE program that will sum a6 to a10 and display the result of an arithmetic sequence whose first element is equal to 4 and whose step size is an integer received from the user. Your program must prompt the user to enter the step size and format the display as ''Sum = result'' where result is the calculated sum. Likewise, the display must be on its own line. For instance, if the user entered 2 for the step size, your program should display ''Sum = 90''.

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