Week 1 2 Value 18 13 Using the naive method most recent value as the forecast for the next week compute the following measures of forecast accuracy a Mean absolute error If required round your answer to one decimal place 3 15 4 5 6 11 19 15 b Mean squared error If required round your answer to one decimal place c Mean absolute percentage error If required round your intermediate calculations and final answer to two decimal places d What is the forecast for week 7