tasked with making a “batch of vodka strawberry lemonade” and lost on ratios!

i was asked to make a big batch of strawberry lemonade with vodka for a party this weekend, i have a 1.5 gallon pitcher and would like to do just a gallon of the drink. any recommendations on how exactly to ratio this out?

i think i want to blend strawberries with simple syrup, strain and add lemon juice. but im not sure how much of everything, including alcohol, i should use to come out with around a gallon. also not sure if i should do strawberry vodka, plain vodka or something else?

worth noting that the birthday girl specifically said vodka but im sure adding other things would be fine too.

thanks in advance