Repeat Exercise 8 of Section 10.2 using the continuation method and the Runge-Kutta method of order four

Question:

Repeat Exercise 8 of Section 10.2 using the continuation method and the Runge-Kutta method of order four with N = 1.
In exercise
E1: 4x1 − x2 + x3 = x1 x4,....................E2: −x1 + 3x2 − 2x3 = x2 x4,
E3: x1 − 2x2 + 3x3 = x3 x4,........................E4: x21 + x22 + x23 = 1