Making fourth part

The part appears to be a casting. To make the part below, I would suggest you to download the image first using right click. Modeling the part is very straightforward and easy. We need to first make the complete sketch using the dimensions as shown below. The section view provides information about the depth of pockets and extrusion of profile.  

Exercise

The sketch will be made in full i.e. including profiles that we need to extrude as well as the profiled that we need to pocket. We will use the complex profile option to select sub profiles from within the sketch also if required we will be able to copy the original sketch onto other planes. In the final part, we will apply fillets and draft to the part.