Final answer:
The question involves finding the principal stresses and maximum shearing stress at a point in a cantilever beam, which requires calculations based on mechanics of materials in engineering.
Step-by-step explanation:
The provided question pertains to finding the principal stresses and the maximum shearing stress at a specific point within a cantilever beam subjected to several applied forces. It is a problem common in the study of mechanics of materials within the engineering discipline. The question requires a solid understanding of equilibrium conditions, stress-strain relationships, and the transformation of stress components. Calculating principal stresses involves finding the normal stress components on planes where the shear stress is zero. The maximum shearing stress can be obtained using the principal stresses and applying relevant transformation equations. Although the question does not provide all necessary parameters, the student may need to perform an analysis involving bending moments, shear force calculations, and potentially the use of Mohr's Circle to find the desired stress values at point H. Unfortunately, the question lacks the complete set of information needed to calculate the required stresses, such as the geometry or the location of point H in detail.