2. Numerically solve the following differential equations using the Euler method: du dt =V (1) dv =-kv-u³ +B cost. dt with k=0.1, B = 11.0, and plot the result using gnuplot. Change the parameters to k=0.4, B=20.0 and show the graph as well. You can use the initial condition as u(0) = 1, v(0) = 1. Also, use h = 0.01, i = 10000.