4.18 [5] < §4.5> assume that x1 is initialized to 11 and x2 is initialized to 22. suppose you executed the code below on a version of the pipeline from section 4.5 that does not handle data hazards (i. e., the programmer is responsible for addressing data hazards by inserting nop instructions where necessary). what would the final values of registers x3 and x4 be? addi x1, x2, #5 add x3, x1, x2 addi x4, x1, #15