Answer
Please see the work below.
Work Step by Step
We know that
a. $NR$
b. $Na_2CO_3+MgBr_2+2NaBr+MgCO_3$
c. $MgSO_4+2NaOH\rightarrow Mg(OH)_2+Na_2SO_4$
d. $Mg^{+2}+(OH)^- \rightarrow Mg(OH)_2$
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