Happy Feet Dance Studio has had the following number of people signing up for dance lessons over the past three years. Calculate the anticipated demand for lessons in March, April, and May of next year, given the seasonality of demand and a trend of t = 100 + 15t.

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Year 1 Year 2 Year 3 January 20 January 28 January 40 February 106 February 115 February 122 March 50 March 62 March 77 April 100 Apri 110 Apri 123 May 107 May 122 May 135