Predict the major product(S) of the following reactions and explain their formation .
`H_(3)C-CH=CH_(2)overset((Ph-CO-0)_(2))underset(HBr)rarrH_(3)C-CH=CH_(2)overset(HBr)rarr`

Explanation

To predict the major products of the given reactions and explain their formation, we will analyze each reaction step by step.

### Step 1: Analyze the First Reaction
The first reaction involves the alkene `H3C-CH=CH2` reacting with HBr in the presence of peroxides.

1. **Identify the Reaction Type**: The presence of peroxides indicates that the reaction will follow the anti-Markovnikov rule. This means that the bromine (Br) will add to the less substituted carbon of the double bond.

2. **Mechanism**: The reaction proceeds via a radical mechanism:
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