I found the answer of a. but i can't find b, c and d please explain these concepts lightly to me. this is a simple question and chatgpt gets it wrong. please don't waste my question with your chatgpt answer. I will downvote the wrong answer.

answers for a, b, c and d are as according: a. 89 b. MAD=2.7 c. MSE=13.35 d. MAPE=2.99%

3. Daily high temperatures in St. Louis for the last week were as follows: 93,94,93,95,96,88,90 (yesterday). a. Forecast the high temperature today, using a 2-day moving average. b. Calculate the mean absolute deviation based on a 2-day moving average. c. Compute the mean squared error for the 2-day moving average. d. Calculate the mean absolute percent error for the 2-day moving average