1) Identify the differential equation as: Order, Linear or not-Lincar, ODE or PDE?

a) x²y+³y=4

b) x(y)² = y + x

c) y" (sin.x)y'

d) y = x(sin y)

e x³y = 1

f) 63³-x=1

g) x²-x²=2

h) sin(y)-x=y

i)y=sin x

j) xy-ey=sin y

k) uzz + ₁₂ + a₂u = f(x)

()u(x1) = X(x)T(1)