$2\mathrm{.}2$ Consider the net cash flow sequences

$A=(50,51,-4),B=(50,528,-22),$ at time $t=0,1,2.$ Suppose the net present value for $A$ is $108$ and that of $B$ is $594$ at time $2.$ Find the internal rate of return for each outlay. Suppose the interest of both cash flows is $7\%,$ which one is a more viable investment?