classify the following Differential equations as, Seperable, linear, exact, homogeneous, or bernoulli: DO NOT SOLVE a. (y^2+1)dx = ysec^x dy b. y(lnx-lny)dx = (xlnx - xlny - y)dy c. (6x+1)y^2 dy/dx +3x^2 +2y^3 = 0 d. dy/dx = - (3y^2+2x) / (4y^2 +6xy) Solution (a) separable (b) exact (c) exact (d) homogeneous.