Consider a  simple economy with two individuals, John and Marsha.  The economy is  endowed with 30 kilograms of cheese and 30 loaves of bread each month.   John and Marsha's preferences for bread and cheese are given by their  marginal rates of substitution of bread for cheese:
 
 MRSJbc  = 10 
 xJb
 
 MRSMbc  = 5 
 xMb
 
 where xJb is the quantity of bread consumed by John and   xMb
 is the quantity of bread consumed by Marsha.  
 
 a.	If each individual only had one loaf of bread, how much cheese would  each individual be willing to give up in order to have another loaf of  bread.
 b.	In the initial allocation, each individual has 15 kilograms of cheese  and 15 loaves of bread.  Draw the Edgeworth Box diagram for this  economy and explain whether the initial allocation of cheese is Pareto  efficient.
 c.	Draw the contract curve for this economy where the MRSs are equal.