Is it permissible to throw the seven pebbles of Jamarat Al-'Aqaba simultaneously?

According to the opinion of the followed four schools of jurisprudence, it is obligatory to throw the pebbles separately and whoever neglects to throw the most number of pebbles on any of the days of stoning must sacrifice an animal.

The ruling
The inquirer must sacrifice an animal in any of the sites of the Sacred Precinct whether at Mina, Mecca or Muzdalifa anytime during the year before the next hajj season.
And God the Almighty knows best.