Please, I really need help on this question ASAP, I will leave you a very good review when you are done. Thank you!

An antiproton (same properties as a proton but with a negative charge, q=-e) is moving in the combined electric and magnetic fields shown below, where E =1200 V/m, B =2.8 T, and v =520 m/5. X X X X X X X X X X X X X X X X X X X X a. What are the magnitude and direction of the antiproton's acceleration in this instant? (2 , marks) b. What would be the magnitude and direction of the antiproton's acceleration if the velocity were reversed? (2 marks)