What are the steps to this problem?

Ben bowled 124 and 188 in his first two games. what must he bowl in his third game to have an average of at least 160?

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?