PLEASE HELP I GIVE BRAINLIEST AND THANKS AND 5 STAR Ok so basically I put some attachments at the bottom and its a worksheet pls someone help me ask much as you can (don't mind the in class boxes)

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?