Short answers, pulled from the story.
The Mariner 4 spacecraft had an octagonal magnesium frame four feet across a diagonal and three feet high. The overall height including solar panels was fourteen feet with an end-to-end span of twelve feet.
Mariner 4 launched on the 28th of November 1964 at fourteen hours twenty-seven minutes twenty-three seconds UTC. The Agena-D/Mariner 4 combination separated from the Atlas-D booster at that time before entering Earth parking orbit.
The Mariner 4 television camera took twenty-one pictures using alternate red and green filters plus twenty-one lines of a twenty-second picture. These images covered about one percent of the planet's surface starting near forty degrees North and ending at fifty degrees South.
The Geiger-Müller tube part of the ionization chamber failed in February 1965 while the plasma probe suffered performance degradation due to a resistor failure on the 8th of December 1964. All other instruments operated successfully despite these specific component issues.
Mariner 3 failed because the payload shroud jettison mechanism became tangled preventing separation of the metal fairing exterior from the Fiberglas inner lining. This malfunction caused pressure differential issues that prevented the spacecraft from deploying properly after launch.