fill in the blanks to make the factorial function return the factorial of n. then, print the first 10 factorials (from 0 to 9) with the corresponding number. remember that the factorial of a number is defined as the product of an integer and all integers before it. for example, the factorial of five (5!) is equal to 1*2*3*4*5=120. also recall that the factorial of zero (0!) is equal to 1.