Yes each of the cases would be easily recognized from the constellations and spectrums shown. We don't provide direct answers to homework questions so as to not bypass the learning opportunity, so I will try and provide some hints which should help "connect the dots" (pun intended).
This is an exercise to recognize the purpose of pulse shaping which ultimately is for spectral efficiency. A rectangular pulse which is simplest has the widest spectral occupancy. This is intuitive when we consider a location on the constellation switching instantly from one symbol to the next (in the extreme unrealizable case, infinite bandwidth is required to go from one dot to another on the constellation diagram in zero transition time).
We slow the transitions from one symbol the next, which serves the purpose of restricting the bandwidth (thus better spectral efficiency: less bandwidth required to send the same amount of data).
The Raised Cosine Pulse Shaping Filter is a commonly used implementation and is part of the broader class of Nyquist Pulse shapes which have the attractive property of restricting the bandwidth without introducing inter-symbol interference (ISI). Because of this, it is a common misconception that the purpose of Nyquist Pulse Shaping is to not have ISI - to be clear, the purpose is solely to restrict bandwidth, and the Nyquist Pulse allows us to do that without introducing ISI.
Another feature of optimum radio design is to use a matched filter in the receiver. To do this, it is common to factor the Raised Cosine Pulse Shaping Filter into two filters, each as a Root-Raised Cosine Filter. One of the two filters will be in the transmitter and the other in the receiver. After the transmit filter, there WILL be ISI in the waveform, but this is eliminated after being passed through the second (matched) filter in the receiver, so that ISI is of no consequence- but we would see it if observed between transmit and receive. Ultimately we only care that all ISI is eliminated before making "decisions" on which symbol was transmitted in the receiver, and this would occur after that matched filter (and after all timing, frequency, phase and amplitude offsets have been removed).