Before revision:  In addition to proving how to construct MERB methods from certain classes of ExpRB methods, we provide rigorous convergence analysis of the resulting schemes, and present candidate MERB schemes of orders two through six  .
After revision:  In addition to proving how to construct MERB methods from certain classes of ExpRB methods, we provide rigorous convergence analysis of the resulting schemes, and present candidate MERB schemes of orders two through six (the highest order ever constructed infinitesimal multirate methods) .