LPC1788 hex info

Hi,
I am working on lpc1788 with RTOS and have TCP driver enable with external NAND(512Mb)flash memory interfaced,Someone please guide ,how much minimum and maximum stack and heap is required .

And in my startup_lpc1788.s file i have given stack and heap size is as below
Stack size : 0x00001500
heap size : 0x00000800

And in my RTX_conf_CM.c file OS STKSIZE :600
Number of task :12

Tell me description about each below hex file values description.
After compiling my hex file show me below memory values, whether that much memory is sufficient to work code??

hex file values:

Program Size: Code=246502 RO-data=34222 RW-data=4680 ZI-data=433380