Geometry help proportions and similarity
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Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

Peter applied to an accounting firm and a consulting firm. he knows that 30% of similarly qualified applicants receive job offers from the accounting firm, while only 20% of similarly qualified applicants receive job offers from the consulting firm. assume that receiving an offer from one firm is independent of receiving an offer from the other. what is the probability that both firms offer peter a job?