Simple maths question struggling a bit :)

An assembly consists of two mechanical components. suppose that the probabilities that the first and second components meet specifications are 0.87 and 0.84. assume that the components are independent. determine the probability mass function of the number of components in the assembly that meet specifications. x

Can someone me i’m confused. will give brainliest and a whole bunch of points

The graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.