Помогите пожалуйста перевести с русского на английский,используя модальные глаголы их эквиваленты

1 This man's name is John. You may have met him in the lab. 2 Specialists in modern computer technology must know both Physics Mathematics well. 3 you shouldn't take much cash with you. Take a credit card. 4 all people can learn to work on the computer using special programms. 5 now they must be doing this interesting experiment. 6 Isaac Newton was able to check his theory of gravitation on big astronomic objects after 1665.