Suppose we apply an enhancement, E1, that speeds up 20% of a program by a factor of 4. And we apply another enhancement, E2, that speeds up another 10% of the program by a factor of 10. Assume the two enhancements are independent and affect different parts of the program (there is no overlap between the 20% and 10% of program). What is the overall speed up for the entire program using both E1 and E2 simultaneously?