It will depend on you in what topics you find interest . I suggest you to choose something which you are interested . Each topics are vast and informative in their own domain. In Sensors and Actuators you have to study about various types of sensors like

Vision and Imaging Sensors.

Temperature Sensors.

Radiation Sensors.

Proximity Sensors.

Pressure Sensors.  And Actuators like

electric motors, stepper motors, jackscrews etc.

Probability and random process includes

General aspects.

Foundations of probability theory.

Random variables.

Conditional probability.

Theory of probability distributions.

Properties of probability distributions.

Applied probability.

Stochastic processes. Etc

In complex and linear algebra , topics like

Fourier transform

Laplace transform

Bassel theorem etc.

Regarding Science and Technology , topics like

Communication Technology. Emerging Technologies. Health Care Technology. Science, Technology, and Innovation Policy may be present.

Hopes this helps.

Wish you luck!