There is a value in register R0 which needs to have some bits set to 1, some bits set to 0, some bits complemented and the ret left unchanged. The desired patter is shown below, where X indicate a bit to be left unchanged, and - indicates a bit to be complemented. Write the appropriate ARM assembly code to perform this task using no more than four individual instructions. Exra credit: solve this problem using two instructions xxxxxxxxxxxx11110000----xxxxxxxx