### Question:
Interpolation { public float interpolateSample(float[][] samples, float fracX, float fracY) { float[] interpY = new float[samplesY]; for (int i = 0; i < samplesY; i++) { float val = interpolateSampleX(samples[i], fracX); interpY[i] = val; } return interpolateSampleY(interpY, fracY); } Interpolation(float[][] input);  Interpolation(float[][] input, int lenX, int lenY);  Interpolation(float[][] input, int lenX, int lenY, int samples); protected  Interpolation(); static Interpolation getInstance(Type type, float[][] input); abstract float interpolateSampleX(float[] samples, float fracX); float interpolateX(float[] arr, float fracX, int offsetX); float interpolateSampleY(float[] samples, float fracY); float interpolateY(float[] arr, float fracY, int offsetY); float interpolateSample(float[][] samples, float fracX, float fracY); float interpolate(float[][] arr, float fracX, float fracY, int offsetX, int offsetY); float interpolate(float[][] arr, float inputX, float inputY); static float getSigFig(float value); float[][] resize(int lenX, int lenY); float[][] crop(float top, float right, float bottom, float left); float[][] cropAndResize(int lenX, int lenY,
            float minX, float minY, float maxX, float maxY);  }### Answer:
@Test public void testInterpolateSample() { float[][] samples = new float[][] { { 1, 1, 2, 2, }, { 1, 1, 2, 2, }, { 4, 4, 5, 5, }, { 4, 4, 5, 5 } }; assertEquals(1.0 ,instance.interpolateSample(samples, 0.0f, 0.0f), 0.001); assertEquals(2.0 ,instance.interpolateSample(samples, 1.0f, 0.0f), 0.001); assertEquals(4.0 ,instance.interpolateSample(samples, 0.0f, 1.0f), 0.001); assertEquals(5.0 ,instance.interpolateSample(samples, 1.0f, 1.0f), 0.001); assertEquals(3.0 ,instance.interpolateSample(samples, 0.5f, 0.5f), 0.001); assertEquals(2.0 ,instance.interpolateSample(samples, 0.25f, 0.25f), 0.001); assertEquals(2.5 ,instance.interpolateSample(samples, 0.75f, 0.25f), 0.001); assertEquals(3.5 ,instance.interpolateSample(samples, 0.25f, 0.75f), 0.001); assertEquals(4.0 ,instance.interpolateSample(samples, 0.75f, 0.75f), 0.001); }