Apache Bench script - needs some work

bench.sh

#!/usr/local/bin/bash

numberOfRequestsValues="10 20 40"
concurrencyValues="1 2 4"

abCmd="/usr/local/sbin/ab"

for url in $(cat $1); do
  echo "# $url"
  echo
  for numberOfRequests in $numberOfRequestsValues; do
    for concurrency in $concurrencyValues; do
      echo "## Requests: $numberOfRequests; Concurrency: $concurrency"
      echo '```'
      $abCmd -r -n $numberOfRequests -c $concurrency $url 2>&1
      echo '```'
      echo
    done
  done
  echo "## Number of requests serviced in 20 seconds"
  $abCmd -t 20 $url 2>&1
  echo
done