PLease help c++

struct supplierType

{

string name;

int supplierID;

};

struct applianceType

{

supplierType supplier;

string modelNo;

float cost;

};

applianceType applianceList[25];

Which of following statements correctly initializes the cost of each appliance to 0?

1. applianceList.cost = 0;

2. applianceList.cost[25] = 0;

3. for (int j = 1; j < 25; j++)

applianceList.cost[j] = 0;

4. for (int j = 0; j < 25; j++)

applianceList.cost[j] = 0;

Thanks!