1.Which of the following are invalid variable names, why? Int char 6_05 Calloc Xx alpha_beta Floating _1312 z A$ 2.which of the following are invalid constants? Why? 123.456 0x10.5 ox0G1 0001 ocFFFF 123L 0xab05 0L -597.23 123.5e2 .0001 +12 98.6F 98.7U 17777s 0996 -12E-12 07777 1234uL 1.2Fe-7 15,000 1.234: 197u 100U 0xABDEL 0xabcu +123