In the given circuit, the diodes are ideal. The current \( I \) through the diode \( D_1 \) in milliamperes is (rounded off to two decimal places).
Step 1: Analyze the circuit. Using ideal diode assumptions, determine which diodes are conducting. Solve for \( I \) using Kirchhoff's Voltage Law (KVL) and Ohm's Law.
Step 2: Calculate the current \( I \). After analyzing the circuit: \[ I = 1.64 \, \text{to} \, 1.70 \, \text{mA}. \]