The correct answers are:
Verbal Phrase: named Robert
Type: Participle
Step-by-step explanation:
Verbal phrases are of three kinds:
1. Participle (verb + ed/ing) -> acts as an adjective or adverb
2. Gerund (verb+ing) -> acts as a noun
3. Infinitive (To + base-form-of-verb) -> acts as a noun, adjective or adverb.
In the sentence, there is neither a gerund nor an infinitive; however, there is a participle "named" in the given sentence. The complete verbal phrase will be "named Robert", which explains the word "boy." Hence, the verbal phrase is "named Robert", and the type is "Participle."