The following table shows the sales data of a particular model of a DVD player. If the forecast sales for May is 36.25, calculate the sales forecast for July using the simple exponential smoothing (SES) model with a smoothing constant of 0.40.

Month	Sales
Jan	35
Feb	29
Mar	39
Apr	42
May	51
Jun	56

	a.	The sales forecast for July is more than 30 but less than or equal to 35.
	b.	The sales forecast for July is more than 35 but less than or equal to 40.
	c.	The sales forecast for July is more than 40 but less than or equal to 50.
	d.	The sales forecast for July is more than 50 but less than or equal to 55.