Equations math problem help???!!!!

Any help would be appreciated! I got every other questions and got stumped on this one. HELP!
Here is the question:

One serving of a breakfast mixture consists of 200mL of corn bran cereal and 250mL of 2% milk. Two servings of the mixture provide 1.4 mg of thiamin. If 250 mL of 2% milk provides 0.1 mg of thiamin, what mass of thiamin is in 200mL of the cereal?

a) What is the quantity of thiamin in one serving of cereal and milk?
b) What amount of thiamin does 250mL of milk provide?
c) Write an equation that models the situation. Use c to represent the amount of thiamin in one serving of cereal. Use the amount you calculated in part a) to represent the total thiamin in one serving of cereal and milk. Use the amount in part b) to represent the amount of thiamin in one serving of milk.
d) solve the equation ( I can do that)
e) Rewrite the equation in a different way. Use the same letter to represent the cereal. Solve your equation and mark units in milligrams.

1 serving:
200 mL corn bran cereal
250 mL of 2% milk

a)

2 servings = 1.4 mg of thiamin
1 serving = 0.7 mg of thiamin

b)

250 mL of milk = 0.1 mg of thiamin

c)

0.7 = 0.1 + c

d)

c = 0.6

e)

0.7 − c = 0.1

You're a nice person.