electronic system design

plz any one explain to me how to design and simulate

A stabilised discrete linear power supply needs to be designed. The power supply can only use discrete components, e.g. transformer, resistors, diodes, transistors, etc. The only exception is Operational Amplifiers (opamps) which may be used. The power supply needs to conform to the following specifications:

Input Voltage: mains 230V, 50Hz
Output Voltage: 10V
Maximum output current: 1A
Short-circuit protection
Current limiting
Low quiescent current.

Using the circuit simulator, evaluate the performance of your design with respect to:

(i) power consumption (based on quiescent current)

(ii) dropout voltage

(iii) ripple rejection

(iv) load regulation (as %)

(v) line regulation (assume ±10% variation on mains voltage).

2. Compare your results with a simulation of a standard IC linear regulator of your choice
(e.g. 7805).

3. If the maximum output current is to be increased to 2A what changes would be needed
in your circuit? Recommend, and justify the choice of,any component changes.