pls solve

Part A Two 1.7 cm-diameter disks face each other, 2.9 mm apart. They are charged to : 13 nC. What is the electric field strength between the disks? Express your answer to two significant figures and include the appropriate units. View Available Hint(s) OF ? Value Units Submit Part B A proton is shot from the negative disk toward the positive disk. What launch speed must the proton have to just barely reach the positive disk? Express your answer to two significant figures and include the appropriate units. View Available Hint(s) + 0 0 ? Value Units Submit