In an unpolished version, a Bash-script could look like this:

    #!/bin/bash

    printf "IPs where status is fail:\n"
    grep -z -oP 'IP=\K.*\n(?=STATUS=FAIL)' datafile

    printf "Avg time taken by all requests where status is 'success':\n"
    grep -z -oP 'STATUS=SUCCESS\nTIME=\K\d+' datafile | \
      awk '{ total += $1; count++ }   END { print total/count }'

    printf "Number of logins (successful and failed) via Mobile:\n"
    grep -c 'Source=Mobile' datafile