Andy Cole scored 34 goals and got 13 assists, making a total of 47 goals he was involved in, 12 more than the next highest (Robin van Persie).
Firmino really showed off during the Reds' next score in the 57th minute. They are good players.
Saturday's game was yet again a trip too far for West Ham as they succumbed easily to yet another away defeat on Merseyside.
Alexander-Arnold, a 19-year-old local product, has made the Reds' right-back spot his own in recent weeks with some brilliant performances and seemingly earning the trust of Jurgen Klopp.
He added: "He is priceless to us".More news: Weather week ahead: Rain gone until the end of the weekend
Given they were already out of the FA Cup, Klopp used the mini break that followed to take his team to Marbella on a warm-weather training camp.
"Now we know so much about each other, now we like each other, now we have better times with each other in private and on the football pitch". It was just a good game and we were really hard to play today, I would say.
"They are all so positive then we start doing the amusing things and all that stuff so you get completely soft", he argued, with the overriding message for his players being to remain focused.
Having lost 5-0 at Everton this season, nine goals conceded in the city of Liverpool this term is a wretched statistic.
"The second half was tough for us", midfielder Mark Noble told whufc.com. They did it to Manchester City here and scored four goals and pounced on mistakes. So we will see how far he's going to go with that.