Happy Family Restaurant sells Dumplings (D) and Rolls (R). Each Dumpling costs $2. Customers can buy up to 5 rolls at $1/each, but pay $3/each for more than 5 rolls.

A) Suppose that Giovanna buys 4 Dumplings and 3 Rolls. What is her MRS(D,R)? Explain what this means in words

B) Suppose that Jakina buys 6 Dumplings and 5 rolls. What is her MRS(D,R)? Explain what this means in words

C) True, False, or Uncertain: If customers could buy any number of Rolls at $1 each, Giovanna and Jakina would both increase their consumption of Rolls. Explain.