0.67/1 pt 398 Detai The graph shows the water level in a reservoir as a function of the number of months since the start of the year. 100 90 80 70 60 50 40 30 20 10 -1 1 2 3 4 5 6 7 8 9 10 10 The highest water level was reached in month and the lowest water level was reached in month