Urgent Physics - 1 Question

In the following, explain each step carefully and provide a drawing. A Coke can is brought into the electric field of a negatively charged golf tube. (a)What is the direction of the force on the Coke can and why? (b)The Coke can is then grounded in the presence of the golf tube. The golf tube had negative charge then what is the sign of the charge on the Coke can? (c)What is the direction of the force on the Coke can after grounding and why?