How can high government debt lead to slow economic growth in the future? $($i Stock markets will weaken.$($ii$)$ Governments may find it hard to fund other spending such as infrastructure projects. $($ili$)$ Governments may increase future taxes to make interest payments on rising debt. $($iv$)$ Governments borrow funds that might otherwise have been used for investment. $(1)$ only $($ii$),($iii$),$ and $($iv$)($iii$)$ and $($iv$)($iv$)$ only