$1)(25$ points$)$ Construct an Arm assembly program to implement the pseudocode below. This code is from the steps the reader takes to check that it receives a response from each tag and that the response is valid, then it XORs together all the valid M$1($i$)$ responses. Define the following data items in the code area: size, $\backslash ($ s$\_\{-\}$ R T$,$ r$\_\{-\}$ R $\backslash )$ and arrays $\backslash ($ M $1,$ m $1\backslash ).($Variable size is the number of tags, $\backslash ($ s$\_\{-\}$ R T $\backslash )$ is a secret shared by reader and tags, $\backslash ($ r$\_\{-\}$ R $\backslash )$ is a random number generated by the reader, and $\backslash ($ m $1($i$)\backslash )$ is an integrity check of the message sent by tag i$.)$ Define the following data items in the data area: M$1$star, M$1$star$\_$r$.$