Sag Vertical Curve joining $-7\%,+4\%$ grade for $45mph.$ VPC $(661+44),$ elevation $1511\mathrm{.}80f$

Reaction time $2\mathrm{.}5s,$ rate for braking $11\mathrm{.}2f\frac{t}{s^2}$

Find:

SSD

Curve length $\frac{w}{?}$ Lmin equation, curve length $\frac{w}{k}-$value

Station of VPI

Elevation of VPI

Station of VPT

Elevation of VPT

Curve elevation at first whole station following VPC

Curve elevation at fourth whole station following VPC