Can DDR5 be Installed In A DDR4 Memory Slot?

Is DDR5 backwards compatible with DDR4? ddr4 vs ddr5 slot DDR5 Memory or DDR4 RAM? 3600Mhz or 6000MHz? What should you buy for gaming, on ddr4 vs ddr5 slot No support for Intel Optane Persistent Memory New DDR5 memory offers significant performance improvements over DDR4; Support for lower-cost 9x4 DIMMs

ddr4 sodimm slot DDR5 feeds the need for speed, delivering an immediate 50% increase in bandwidth over DDR4 DIMMs with a data rate of Gbs Per the JEDEC