Right answer:
tiene pensado
Since Pamela can be replaced by the subject pronoun ella that matches the third person singular in feminine form, we choose the conjugation tiene of the verb tener. On the other hand, pensado comes from the verb pensar and tiene pensado is the more logical answer to be used here the sentence Pamela tiene pensado trabajar en la biblioteca el próximo means:
Pamela plans to work in the library next
