Three sentences are given. You need to find if they are grammatically correct or incorrect and mark the answer accordingly.

(P)   I managed to bargain down to two dollars an hour, and then he brought from his house nearby a sort of large black box on wheels

(Q)  He had already made it his own task to find Oliver Lutkins for me.

(R)   At the end, he hit me on the shoulder and laughed, “Well, will give Brother Lutkins a little surprise.