Singular and plural subjects

English

What is the subject of this sentence? 'The girl and her father held hands.'

What is the verb in this sentence? 'The cat and the dog fought.'

What is the subject of this sentence? 'Two pretty birds sat on a branch.'

Which of these words should have a capital letter?

What is the subject of this sentence? 'You looked at Jimmy.'

What is the verb in this sentence? 'We went to the beach.'