According to Saddleback college located in California;
12 units are considered full-time student status.
You may take as little as 0.5 units or as many as 19.0 units during a single semester. To take more than 19 units you are required to obtain special permission from the Counseling Department.
Because we are inserting commands to beq, we will need an execution of the ALU, and then a register write. This result in and increase cycle time of the PC relative branch:
440+90=530ps.
As it is the longest time to execute, so its a critical path
The answer would be true. They're notes, so you don't need it to be written perfectly.
Edit: How would this be incorrect? A study guide is a personal thing, and so are notes. So long as you understand the notes, they don't need to be written as perfectly as an essay would.