Help with balancing equation and identifying its reaction type please

The equation is already balanced

The type of reaction is decomposition

Explanation:

Step 1 Balancing equation
First list the elements and how many atoms of that element are on each side to find out what we need to balance

CuCO3 ==> CuO + CO2

         3   O   3

         1   Cu   1

         1    C   1

It appears that each element is balanced on each side already so the equation is already balanced.

Next we identify the type of reaction

These are the 4 main types of reactions and this is how they are typically written

Synthesis : A + B ==> AB

Decomposition : AB ==> A + B

Double Replacement : AB + CD ==> AC + BD

Single Replacement : AB + C ==> AC + B          

The given equation, CuCO3 ==> CuO + CO2 appears to follow the decomposition reaction structure, AB ==> A + B as it starts off as a single compound and is decomposed into two or more substances.

the answers would be

the first one and the second one