Answer:
Ans. a) Present Value $3,145.20 b) Present Value $2,902.42 c) Present Value $4,125.74 d) Present Value $4,129.83
Step-by-step explanation:
Hi, questions a) through c) can be answered with the following equation:

Where:
r = discount rate (or the rate with what the problem starts)
n = Periods per year ( for a) 12, b) 4, c) 365)
t = years
So, let´s start answering.
a) should look like this.

b) Should look like this

c) Should look like this

d) on the other hand follows this equation.

Again, "t" is years to present value.
d) would look like this.

Best of luck