Consider the reaction sequence given below:

Which of the following statements is true:

Doubling the concentration of base will double the rate of both the reactions.
 

Changing the concentration of base will have no effect on reaction (2)
 

Changing the base from ${\mathrm{OH}}^{-}$ to ${}^{-}\mathrm{OR}$ will have no effect on reaction (2)
 

4) Changing the concentration of base will have no effect on reaction (1).