i) (a) Which part is called as heart of CRO? (b) List out the main units of CRO. ii) A non-inverting op-amp circuit has the open loop gain of 148 and the resistances R1=1100 Q and R2 = 5.8 kQ. Calculate (a) The actual value of voltage gain (b) Considering the finite open loop gain, the ideal value of gain (c) Error, when ideal voltage gain is compared with actual voltage gain (d) The percentage error, when ideal voltage gain is compared with actual voltage gain. (a) The actual value of voltage gain (b) The ideal value of voltage gain (c) Error, when ideal voltage gain is compared with actual voltage gain. (d) The percentage error, when ideal voltage gain is compared with actual voltage gain.