I urgently need help with question $5!$

iv$.,4^8**5^{12}$ mod $14($Hint: Try to compute the exponent in stages, each time simplifying it using the mod function. For example, to compute $48$mod$14,$ express $14)4$ mod $14,$ compute the one in the parenthesis, and repeat this process$)$

v$.,5^{10}**6^8$mod$14,($same as above$)$