Can someone answer these spanish questions asap

1- prefiero usarla/prefiero la usar
2- quiren comprarlos/quiren los comparar
3- preferimos llevarlos/preferimos los llevar
4- piensa cerrarla a las ocho/piensa la cerrar a las ocho
5- vas a comprarla/vas a la comprar

1.) i rather use the calculator please .
2.) i want to buy the shoes.
3.) i rather wear the jeans
4.) the store will close at 8.00
5.) will you buy that blouse ?

Idon’t see the definition or the answers.

The answer is b.a, c, and d are not correct