Diode Circuit Analysis

Zener Specs: VZ1 = 10 V, VZ2 = 6.8 VPZ,MAX = 500mW (both diodes)100 ?RxA) With Rx = 30 ? and VIN = 15V, find IZ1, IZ2 and VO VIND1D2100 ? VOB) With Rx = 30 ? and VIN = 18V, find IZ1, IZ2 and VOC) VIN = 18V, what is the range in Rx (Rmin ? Rx ? Rmax) tomaintain that• Both D1 and D2 are regulating (ON) and• PZ,MAX is not exceeded