Given the mapping of registers to variables below, write a program to irgienent the following toprasion Z=A+B+CD Ex. If the values of StQ,St1,St2 and St3 are initialzed in the simulator as the result is stored in St4: Note Use the ' buton under the Reg sters display to initialze register values for Sto. St1, St2, and Sts. LAB ACTIVI.