Draw parallel lines with slope +1.05; one passes through (0,a), and the other passes through (0,b). Suppose φ is a harmonic function between the two lines, with φ = 0 on the line through (0,a) and φ = 1 on the line through (0,b). What is the value of φ, to 3 decimal places, at the point x = 0.3, and y = (3a + 2b)/5? Call this number "m10".